In this course, students will learn general strategies for planning, designing, developing, implementing, and maintaining an IoT system through various case studies and by assembling and configuring an IoT device to work in a sensor network.
Duration 5 Days 30 CPD hours This course is intended for Professionals who need to maintain or set up a Kubernetes cluster Container Orchestration Engineers DevOps Professionals Overview Cluster architecture, installation, and configuration Rolling out and rolling back applications in production Scaling clusters and applications to best use How to create robust, self-healing deployments Networking configuration on cluster nodes, services, and CoreDNS Persistent and intelligent storage for applications Troubleshooting cluster, application, and user errors Vendor-agnostic cloud provider-based Kubernetes Kubernetes is a Cloud Orchestration Platform providing reliability, replication, and stability while maximizing resource utilization for applications and services. By the conclusion of this hands-on, vendor agnostic training you will go back to work with the knowledge, skills, and abilities to design, implement, and maintain a production-grade Kubernetes cluster. We prioritize covering all objectives and concepts necessary for passing the Certified Kubernetes Administrator (CKA) exam. You will be provided the components necessary to assemble your own high availability Kubernetes environment and configure, expand, and control it to meet the demands made of cluster administrators. Your week of intensive, hands-on training will conclude with a mock CKA exam that simulates the real exam. Cluster Architecture, Installation & Configuration Each student will be given an environment that allows them to build a Kubernetes cluster from scratch. After a detailed discussion on key architectural components and primitives, students will install and compare two production grade Kubernetes clusters. Review: Kubernetes Fundamentals After successfully instantiating their own Kubernetes Cluster, students will be guided through foundational concepts of deploying and managing applications in a production environment. Workloads & Scheduling After establishing a solid Kubernetes command line foundation, students will be led through discussion and hands-on labs which focus on effectively creating applications that are easy to configure, simple to manage, quick to scale, and able to heal themselves. Services & Networking Thoroughly understanding the underlying physical and network infrastructure of a Kubernetes cluster is an essential skill for a Certified Kubernetes Administrator. After an in-depth discussion of the Kubernetes Networking Model, students explore the networking of their cluster?s Control Plane, Workers, Pods, and Services. Storage Certified Kubernetes Administrators are often in charge of designing and implementing the storage architecture for their clusters. After discussing many common cluster storage solutions and how to best use each, students practice incorporating stateful storage into their applications. Troubleshooting A Certified Kubernetes Administrator is expected to be an effective troubleshooter for their cluster. The lecture covers a variety of ways to evaluate and optimize available log information for efficient troubleshooting, and the labs have students practice diagnosing and resolving several typical issues within their Kubernetes Cluster. Certified Kubernetes Administrator Practice Exam Just like the Cloud Native Computing Foundation CKA Exam, the students will be given two hours to complete hands-on tasks in their own Kubernetes environment. Unlike the certification exam, students taking the Alta3 CKA Practice Exam will have scoring and documented answers available immediately after the exam is complete, and will have built-in class time to re-examine topics that they wish to discuss in greater depth.
Duration 2 Days 12 CPD hours This course is intended for Experienced system administrators, network administrators, and system integrators responsible for designing and implementing networking solutions Network and security professionals who work with enterprise and data center networks Overview By the end of the course, you should be able to meet the following objectives: Discuss the SD-WAN architecture and platform deployment model options Identify and describe the SD-WAN solution components Explain the interaction between the SD-WAN Edge, Orchestrator, and Gateway components Describe the SD-WAN Software-Defined Networking (SDN) approach, traffic, and network flows Explore SD-WAN core features and evaluate how these dramatically improve operational automation Use SD-WAN features to perform simple, agile, and secure SD-WAN operations Simplify branch infrastructure by inserting network services on the branch edge, in the cloud, or in the regional and enterprise data centers This course provides you with the knowledge, skills, and tools to achieve competency in deploying and managing the VMware SD-WAN by VeloCloud environment. In this course, you are introduced to workflows of various software-defined WAN constructs along with several operational tools that help you deploy and manage VMware SD-WAN by VeloCloud. Course Introduction Introductions and course logistics Course objectives Introduction to VMware SD-WAN Solution Revisit the traditional WAN technology, WAN topologies and downsides Explain the challenges solved by Secure Access Service Edge (SASE) and use cases List the components of the VMware SASE? solution Describe the VMware SD-WAN solution and list its capabilities VMware SD-WAN Components and Architecture Understand the architecture of the VMware SD-WAN solution and list all its components Explain the function of VMware SD-WAN Edges, Hub, Gateways, controllers, and Orchestrator Explain how the components of the VMware SD-WAN solution interact with each other Using VMware SD-WAN Orchestrator Describe key attributes of the VMware SD-WAN Orchestrator List primary features of the VMware SD-WAN Orchestrator Navigate the main menus of the VMware SD-WAN Orchestrator portal Deploy and Configure VMware SD-WAN Understand the deployment process of VMware SD-WAN components like VMware SD-WAN Edges, Hubs, Gateways, and more Understand the workflow of the VMware SD-WAN configuration List the optional network services that are supported by VMware and the steps to configure the same Understand the profiles and their application in the VMware SD-WAN infrastructure Describe the VMware SD-WAN Edge activation process Path and Traffic Management List the routing options supported by VMware SD-WAN: Static, BGP, OSPF Understand the Dynamic Multipath Optimization (DMPO) feature and its advantages Explain the Quality of Service and its configuration to manage traffic Securing VMware SD-WAN Environment Explain various options available to secure VMware SD-WAN environments. Understand the firewall capabilities and configuration Monitoring, Maintenance, and Troubleshooting List and understand the various features available to monitor the VMware SD-WAN infrastructure List and understand the various options available to troubleshoot and investigate issues in VMware SD-WAN
Duration 1 Days 6 CPD hours This course is intended for System administrators and security operations personnel, including analysts and managers Overview By the end of the course, you should be able to meet the following objectives: Describe the components and capabilities of the Carbon Black EDR server Identify the architecture and data flows for Carbon Black EDR communication Identify the architecture for a cluster configuration and Carbon Black EDR cluster communication Describe the Carbon Black EDR server data types and data locations Use the API to interact with the Carbon Black EDR server without using the UI Create custom threat feeds for use in the Carbon Black EDR server Perform the integration with a syslog server Use different server-side scripts for troubleshooting Troubleshoot sensor-side configurations and communication This course teaches you how to use the advanced features of the VMware Carbon Black© EDR? product. This usage includes gaining access to the Linux server for management and troubleshooting in addition to configuring integrations and using the API. This course provides an in-depth, technical understanding of the Carbon Black EDR product through comprehensive coursework and hands-on scenario-based labs. This class focuses exclusively on advanced technical topics related to the technical back-end configuration and maintenance Course Introduction Introductions and course logistics Course objectives Architecture Data flows and channels Sizing considerations Communication channels and ports Server Datastores SOLR database Storage configurations and data aging Partition states Postgres Modulestore EDR API CBAPI overview Viewing API calls in the browser Utilizing the API to access data Threat Intelligence Feeds Feed structure Report indicator types Custom threat feed creation and addition Syslog Integration SIEM support Configuration Troubleshooting Server-side scripts Server logs Sensor operations Additional course details:Notes Delivery by TDSynex, Exit Certified and New Horizons an VMware Authorised Training Centre (VATC) Nexus Humans VMware Carbon Black EDR Advanced Administrator training program is a workshop that presents an invigorating mix of sessions, lessons, and masterclasses meticulously crafted to propel your learning expedition forward. This immersive bootcamp-style experience boasts interactive lectures, hands-on labs, and collaborative hackathons, all strategically designed to fortify fundamental concepts. Guided by seasoned coaches, each session offers priceless insights and practical skills crucial for honing your expertise. Whether you're stepping into the realm of professional skills or a seasoned professional, this comprehensive course ensures you're equipped with the knowledge and prowess necessary for success. While we feel this is the best course for the VMware Carbon Black EDR Advanced Administrator course and one of our Top 10 we encourage you to read the course outline to make sure it is the right content for you. Additionally, private sessions, closed classes or dedicated events are available both live online and at our training centres in Dublin and London, as well as at your offices anywhere in the UK, Ireland or across EMEA.
Duration 3 Days 18 CPD hours This course is intended for The Foundation course is designed for individuals who want to gain an overview of Business Analysis (Business Analysts, Requirements Engineers, Product manager, Product Owner, Chief Product Owner, Service Manager, Service Owner, Project manager, Consultants) Overview Students should be able to demonstrate knowledge and understanding of business analysis principles and techniques. Key areas are: the role and competencies of a business analyst strategy analysis business system and business process modelling stakeholder analysis investigation and modelling techniques requirements engineering business case development The business analyst role analyzes, understands and manages the requirements in a customer-supplier relationship and ensures that the right products are delivered. The Foundation Seminar gives a good introduction to the spectrum of this responsibility. Course Introduction Let?s Get to Know Each Other Course Overview Course Learning Objectives Course Structure Course Agenda Introduction to Business Analysis Structure and Benefits of Business Analysis Foundation Exam Details Business Analysis Certification Scheme What is Business Analysis? Intent and Context Origins of business analysis The development of business analysis The scope of business analysis work Taking a holistic approach The role and responsibilities of the business analyst The competencies of a Business Analyst Personal qualities Business knowledge Professional techniques The development of competencies Strategy Analysis The context for strategy The defiition of strategy Strategy development External environmental analysis Internal invironmental analysis SWOT analysis Executing strategy Business Analysis Process Model An approach to problem solving Stages of the business analysis process model Objectives of the process model stages Procedures for each process model stage Techniques used within each process model stage Investigation Techniques Interviews Observation Workshops Scenarios Prototyping Quantitative approaches Documenting the current situation Stakeholder Analysis and Management Stakeholder categories and identification Analysing stakeholders Stakeholder management strategies Managing stakeholders Understanding stakeholder perspectives Business activity models Modelling Business Processes Organizational context An altrnative view of an organization The organizational view of business processes Value propositions Process models Analysing the as-is process model Improving business processes (to-be business process) Defining the Solution Gab analysis Introduction to Business Architecture Definition to Business Architecture Business Architecture techniques Business and Financial Case The business case in the project lifecycle Identifying options Assessing project feasibility Structure of a business case Investment appraisal Establishing the Requirements A framework for requirements engineering Actors in requirements engineering Requirements elicitation Requirements analysis Requirements validation Documenting and Managing the Requirements The requirements document The requirements catalogue Managing requirements Modelling the Requirements Modelling system functions Modelling system data Delivering the Requirements Delivering the solution Context Lifecycles Delivering the Business Solution BA role in the business change lifecycle Design stage Implementation stage Realization stage
Duration 1 Days 6 CPD hours This course is intended for System administrators and security operations personnel, including analysts and managers Overview By the end of the course, you should be able to meet the following objectives: Describe the components and capabilities of VMware Carbon Black Cloud Endpoint Standard Identify the architecture and data flows for Carbon Black Cloud Endpoint Standard communication Perform searches across endpoint data to discover suspicious behavior Manage the Carbon Black Cloud Endpoint Standard rules based on organizational requirements Configure rules to address common threats Evaluate the impact of rules on endpoints Process and respond to alerts Describe the different response capabilities available from VMware Carbon Black CloudTM This course teaches you how to use the VMware Carbon Black Cloud Endpoint? Standard product and leverage the capabilities to configure and maintain the system according to your organization?s security posture and policies. This course provides an in-depth, technical understanding of the product through comprehensive coursework and hands-on scenario-based labs. Course Introduction Introductions and course logistics Course objectives Data Flows and Communication Hardware and software requirements Architecture Data flows Searching Data Creating searches Analyzing events Search operators Advanced queries Policy Components Rules Local scanner Sensor capabilities Prevention Capabilities Using Rules Rule types Rule creation Reputation priority Configuring rules Evaluating rule impact Processing Alerts Alert triage Alert actions Response Capabilities Using quarantine Using live response Hash banning
Duration 2 Days 12 CPD hours This course is intended for Operators and application owners who are responsible for deploying and managing policies for multiple Kubernetes clusters across on-premises and public cloud environments. Overview By the end of the course, you should be able to meet the following objectives: Describe the VMware Tanzu Mission Control architecture Configure user and group access Create access, image registry, network, security, quota, and custom policies Connect your on-premises vSphere with Tanzu Supervisor cluster to VMware Tanzu Mission Control Create, manage, and backup Tanzu Kubernetes clusters Perform cluster inspections Monitor and secure Kubernetes environments During this two-day course, you focus on using VMware Tanzu© Mission Control? to provision and manage Kubernetes clusters. The course covers how to apply access, image registry, network, security, quota, and custom policies to Kubernetes environments. For cluster provisioning and management, the course focuses on deploying, upgrading, backing up and monitoring Kubernetes clusters on VMware vSphere© with Tanzu. Given the abstractions of VMware Tanzu Mission Control, the learnings should be transferrable to public cloud. Introducing VMware Tanzu Mission Control VMware Tanzu Mission Control Accessing VMware Tanzu Mission Control VMware Cloud? services access control VMware Tanzu Mission Control architecture Cluster Management Attached clusters Management clusters Provisioned clusters Cluster inspections Data protection VMware Tanzu© Observability? by Wavefront VMware Tanzu© Service Mesh? Policy Management Policy management Access policies Image registry policies Network policies Security policies Quota policies Custom policies Policy insights
Duration 5 Days 30 CPD hours This course is intended for This course is for all Oracle Professionals. Specifically Database Administrators, Web Server Administrators, System Administrators, CIOs and other IT Management Professionals. Overview Upon successful completion of this course, students will be able to perform many of the day-to-day administration tasks required of an Oracle database administrator. This course introduces many of the powerful capabilities of the Oracle database. In this course, students will learn about day-to-day administration tasks. It will also address administration sub-specialties. Introduction: Managing the Database Instance The Database Management Tools EM Database Express EM Cloud Control SQL Developer Database Administrator Introduction: Database Architecture Review Database Instance Configurations Memory Structures Process Structures Storage Architecture Introduction: Starting & Stopping Databse Services Start & Stop the Database Listener ABOUT DATABASE STARTUP/SHUTDOWN SYSOPER SYSDBA DATABASE STATE & STAGES STARTUP WITH EM CLOUD CONTROL STARTUP WITH SQL*PLUS SHUTDOWN WITH EM CLOUD CONTROL SHUTDOWN WITH SQL*PLUS USING MS WINDOWS SERVICES Introduction: Oracle Network Environment Oracle Net Services Architecture ORACLE NET CONFIGURATION ASSISTANT ORACLE NET MANAGER USING EM CLOUD CONTROL ADVANCED NETWORK COMPRESSION TROUBLESHOOTING NETWORK PROBLEMS Introduction: Diagnostics & Oracle Support About Database Diagnostics Fault Diagnosability Infrastructure DATABASE INSTANCE HEALTH SNAPSHOT THE SUPPORT WORKBENCH PROACTIVE DATABASE HEALTH CHECKS PACKAGE DIAGNOSTIC DATA WORKING WITH THE KNOWLEDGE BASE Storage: Tablespace Management Starter Tablespaces CREATE TABLESPACE WITH EM CC CREATE TABLESPACE WITH SQL MANAGE TABLESPACES WITH EM CC MANAGE TABLESPACES WITH EM DE MANAGE TABLESPACES WITH SQL DROP TABLESPACE ALTER TABLESPACE Storage: Advanced Tablespace Management Managing Temporary Tablespaces TEMP TABLESPACE GROUPS WITH EM TEMP TABLESPACE GROUPS WITH SQL DEFAULT PERMANENT TABLESPACES BIGFILE TABLESPACES MANAGING THE SYSAUX TABLESPACE Storage: Data Files & Temp Files Management Manage Data Files with EM ACCESS METADATA WITH SQL MANAGE DATA FILES WITH SQL MANAGE TEMP FILES ORACLE-MANAGED FILES (OMF) Storage: UNDO Data & UNDO Tablespaces About UNDO Space Management GUARANTEE UNDO RETENTION MONITOR UNDO SPACE WITH SQL USE THE EM UNDO ADVISOR Security & Schemas: Security Overview & Database Privileges Database Security Principles DATABASE SYSTEM PRIVILEGES DATABASE OBJECT PRIVILEGES SUPER ADMINISTRATOR ROLES PRIVILEGE ANALYSIS Security & Schemas: User Security Create & Manage User Accounts MANAGE USERS WITH EM MANAGE USERS WITH SQL CREATE USER ALTER USER DROP USER GRANT & REVOKE PRIVILEGES RESOURCE LIMITS VIA PROFILES ALTER PROFILE DROP PROFILE PASSWORD MANAGEMENT VIA PROFILES ROLE-BASED SECURITY MANAGEMENT ALTER USER...DEFAULT ROLE SET ROLE DELEGATING PRIVILEGE AUTHORIZATION WITH ADMIN OPTION & System Privileges WITH GRANT OPTION & Object Privileges PRINCIPLE OF LEAST PRIVILEGE CHECKLIST Security & Schemas: Database Auditing Auditing Database Activity Traditional Auditing Unified Auditing Create Audit Policy Security & Schemas: SQL Loader Loader Concepts Loader From the Command Line control File Options Load Methods Loader Express Mode Loader From EM Security & Schemas: Export & Import Manage Directory Objects The Data Pump Architecture Data Pump Export Data Pump Import Data Pump Dictionary Views Using the EM CC Interface Performance & Availability: Managing Performance & SQL Tuning Management Advisory Framework Performance Monitoring & AWR The SQL Tuning Advisor Monitoring Exceptions with Metrics Performance & Availability: Data Concurrency About System & User Locks Monitor & Manage User Locks Moitor Locks with Data Dictionary Manage Locks with EM Performance & Availability: Backup & Recovery Concepts Backup & Recovery Structures Managing REDO Data Configuring for Recoverability Instance Recovery Recoverability Checklist Additional course details: Nexus Humans Oracle 12c Administration II training program is a workshop that presents an invigorating mix of sessions, lessons, and masterclasses meticulously crafted to propel your learning expedition forward. This immersive bootcamp-style experience boasts interactive lectures, hands-on labs, and collaborative hackathons, all strategically designed to fortify fundamental concepts. Guided by seasoned coaches, each session offers priceless insights and practical skills crucial for honing your expertise. Whether you're stepping into the realm of professional skills or a seasoned professional, this comprehensive course ensures you're equipped with the knowledge and prowess necessary for success. While we feel this is the best course for the Oracle 12c Administration II course and one of our Top 10 we encourage you to read the course outline to make sure it is the right content for you. Additionally, private sessions, closed classes or dedicated events are available both live online and at our training centres in Dublin and London, as well as at your offices anywhere in the UK, Ireland or across EMEA.
Duration 2 Days 12 CPD hours This course is intended for This course is ideal for beginners and intermediate frontend developers who want to become full-stack developers. You will need some prior working knowledge of JavaScript and MongoDB as we skim over its basics and get straight to work. Overview At the end of this day, students should be able to: Understand the MEAN architecture Create RESTful APIs to complete CRUD tasks Build a blogging application with basic features Describe best practices to secure node applications Implement authentication and authorization Create simple animations using Angular Perform unit testing on Angular applications MongoDB, Express, Angular and Node.js Fundamentals begins by demystifying the MEAN architecture. You will review the features of the JavaScript technologies, frameworks, or libraries that make up a MEAN stack. You will also understand how to develop a RESTful API using Node.js, Express.js, and MongoDB Atlas. This course will enable you to discover how to build a blogging application using the MEAN stack. Next, you will learn about authentication using MEAN, and explore the features of Angular, such as pipes, reactive forms, modules and optimizing apps, animations and unit testing, and much more. By the end of the course, you will have all of the knowledge you need to become a pro at developing efficient web applications using JavaScript technologies. Introduction to the MEAN stack MEAN Architecture Demystification Getting Started with Node Activity 1: Creating an HTTP Server for a Blogging Application Understanding Callbacks, Event loop and EventEmitters in Node Understanding Buffers, Streams and Filesystem in Node Activity 2: Streaming Data to a File Developing RESTful APIs to perform CRUD operations Getting Started with RESTful APIs Getting started with MongoDB Atlas Activity 3: Connecting the Node Application with MongoDB Atlas Getting Started with Express Activity 4: Creating Express API Route and Controller Activity 5: Testing Fully Functional RESTful API Beginning Frontend Development with Angular CLI Getting Started with Angular CLI Using Components, Directives, Services, and Making HTTP Requests in Angular Activity 6: Designing the Frontend and Components for the Blogging Application Activity 7: Writing Services and Making HTTP Request Calls to an API Understanding Angular Forms and Routing Activity 8: Creating a Form Application Using the Reactive/Model-Driven Method Activity 9: Creating and Validating Different Forms Using the Template and Reactive Driven Method Activity 10: Implementing a Router for the Blogging Application Understanding MEAN Stack Security Node Security and Best Practices Node Application Authentication with JSON Web Token (JWT) Activity 11: Securing the RESTful API Node Application Authentication with Passport Activity 12: Creating a Login Page to Allow Authentication with Twitter Using Passport Strategies Angular Declarables, Bootstrapping, and Modularity Using Inbuilt Pipes, Custom Pipes, Custom Directives, and Observables Activity 13: Communicating Between Two Components Using Observable Angular Bootstrapping and Modularity Activity 14: Creating a Lazy Loaded Application Testing and Optimizing Angular Applications Angular Animations and Latest Angular Features Activity 15: Animating the Route Transition Between the Blog Post Page and View Post Page of the Blogging Application Optimizing Angular Applications Testing Angular Applications Activity 16: Performing Unit Testing on the App Root Component and Blog-Post Component Overview on the new features in Angular
Duration 5 Days 30 CPD hours This course is intended for Students preparing to take the CCNP Collaboration certification Network administrators Network engineers Systems engineers Overview After taking this course, you should be able to: Describe the Cisco Collaboration solutions architecture Compare the IP Phone signaling protocols of Session Initiation Protocol (SIP), H323, Media Gateway Control Protocol (MGCP), and Skinny Client Control Protocol (SCCP) Integrate and troubleshoot Cisco Unified Communications Manager with LDAP for user synchronization and user authentication Implement Cisco Unified Communications Manager provisioning features Describe the different codecs and how they are used to transform analogue voice into digital streams Describe a dial plan, and explain call routing in Cisco Unified Communications Manager Implement Public Switched Telephone Network (PSTN) access using MGCP gateways Implement a Cisco gateway for PSTN access Configure calling privileges in Cisco Unified Communications Manager Implement toll fraud prevention Implement globalized call routing within a Cisco Unified Communications Manager cluster Implement and troubleshoot media resources in Cisco Unified Communications Manager Describe Cisco Instant Messaging and Presence, including call flows and protocols Describe and configure endpoints and commonly required features Configure and troubleshoot Cisco Unity Connection integration Configure and troubleshoot Cisco Unity Connection call handlers Describe how Mobile Remote Access (MRA) is used to allow endpoints to work from outside the company Analyze traffic patterns and quality issues in converged IP networks supporting voice, video, and data traffic Define QoS and its models Implement classification and marking Configure classification and marking options on Cisco Catalyst switches The Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) v1.1 course helps you prepare for advanced-level roles focused on implementation and operation of Cisco collaboration solutions. You will gain the knowledge and skills needed to implement and deploy core collaboration and networking technologies, including infrastructure and design, protocols, codecs, and endpoints, Cisco Internetwork Operating System (IOS©) XE gateway and media resources, call control, Quality of Service (QoS), and additional Cisco collaboration applications.This course helps prepare you to take the exam:350-801 Implementing and Operating Cisco Collaboration Core Technologies (CLCOR)After you pass this exam, you earn Cisco Certified Specialist - Collaboration Core certification and satisfy the core requirement for these certifications:CCNP CollaborationCCIE CollaborationThis course prepares you for the 300-435 Automating Cisco Enterprise Solutions (ENAUTO) certification exam. Introducing Automation for Cisco Solutions (CSAU) is required prior to enrolling in Implementing Automation for Cisco Enterprise Solutions (ENAUI) because it provides crucial foundational knowledge essential to success. Course Outlines Describing the Cisco Collaboration Solutions Architecture Exploring Call Signaling over IP Networks Integrating Cisco Unified Communications Manager LDAP Implementing Cisco Unified Communications Manager Provisioning Features Exploring Codecs Describing Dial Plans and Endpoint Addressing Implementing MGCP Gateways Implementing Voice Gateways Configuring Calling Privileges in Cisco Unified Communications Manager Implementing Toll Fraud Prevention Implementing Globalized Call Routing Implementing and Troubleshooting Media Resources in Cisco Unified Communications Manager Describing Cisco Instant Messaging and Presence Enabling Cisco Jabber© Configuring Cisco Unity Connection Integration Configuring Cisco Unity Connection Call Handlers Describing Collaboration Edge Architecture Analyzing Quality Issues in Converged Networks Defining QoS and QoS Models Implementing Classification and Marking Configuring Classification and Marking on Cisco Catalyst Switches