253 Cisco Certified Entry Networking Technician (CCENT) courses delivered Online

Duration 4 Days 24 CPD hours This course is intended for Systems engineers Network engineers Field engineers Technical support personnel Channel partners and resellers Overview After taking this course, you should be able to: Describe the key concepts of segment routing Implement and verify IGP segment routing Migrate an existing Multiprotocol Label Switching (MPLS) LDP-based network to segment routing Implement and verify TI-LFA segment routing Instantiate segment routing policies Instantiate multidomain segment routing policies Configure and verify BGP prefix segments and SR-based services The Implementing Segment Routing on Cisco IOS XR (SEGRTE201) v2.0 course covers the fundamental concepts of segment routing (SR), how to configure and verify segment routing within an Interior Gateway Protocol (IGP), and the interworking of Label Distribution Protocol (LDP) with segment routing. You will learn how to implement topology-independent loop-free alternate (TI-LFA) using segment routing, and how to instantiate and verify segment routing traffic engineering policies. You will also learn how to implement segment routing within Border Gateway Protocol (BGP). Course Outline Introduction to Segment Routing IGP Segment Routing Implementation and Verification Segment Routing and LDP Interworking Topology Independent ? Loop Free Alternate Segment Routing Policies ? Traffic Engineering (SR-TE) Multidomain SR Policies BGP Prefix Segment and Egress Peer Engineering Additional course details: Nexus Humans Cisco Implementing Segment Routing on Cisco IOS XR v2.0 (SEGRTE201) 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 Cisco Implementing Segment Routing on Cisco IOS XR v2.0 (SEGRTE201) 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 5 Days 30 CPD hours Overview At the completion of this course, students already familiar with the RHCT/RHCSA administration skills will have exposure to all competencies tested by the RHCSA and RHCE exams. This course is designed for experienced Linux administrators who require networking and security administration skills. Getting Started with the Classroom Environment Given a virtualized environment, begin to administrate multiple systems using prerequisite skills Enhance User Security Configure system to use Kerberos to verify credentials and grant privileges via sudo Bash Scripting and Tools Automate system administration tasks utilizing Bash scripts and text-based tools File Security with GnuPG Secure files with GnuPG. Software Management Use yum plugins to manage packages and understand the design of packages to build a simple package Network Monitoring Profile running services then capture and analyze network traffic Route Network Traffic Configure system to route traffic and customize network parameters with sysctl Secure Network Traffic Secure network traffic through SSH port forwarding and iptables filtering/network address translation (NAT) NTP Server Configuration Configure an NTP server Filesystems and Logs Manage local file system integrity, monitor system over time, and system logging Centralized and Secure Storage Access centralized storage (iSCSI) and encrypt filesystems SSL-encapsulated Web Services Understand SSL certificates and deploy an SSL encapsulated web service Web Server Additional Configuration Configure web server with virtual hosts, dynamic content, and authenticated directories Basic SMTP Configuration Configure an SMTP server for basic operation (null client, receiving mail, smarthost relay) Caching-Only DNS Server Understand DNS resource records and configure a caching-only name server File Sharing with NFS Configure file sharing between hosts with NFS File Sharing with CIFS Configure file and print sharing between hosts with CIFS File Sharing with FTP Configure file sharing with anonymous FTP Troubleshooting Boot Process Understand the boot process and recover unbootable systems with rescue mode Additional course details: Nexus Humans Enterprise Linux System Admin 3 with Exam Prep 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 Enterprise Linux System Admin 3 with Exam Prep 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 5 Days 30 CPD hours This course is intended for Practiced Linux system administrators who currently manage Linux servers at the enterprise level - Skilled Linux system administrators who who want or are required to demonstrate competencies by earning the RHCSA This course is designed for experienced Linux System Administrators who want to harden their technical skill sets and become accredited with the RHCSA certification. Accessing the command line Log in to a Linux system and run simple commands using the shell. Managing Files from the command line Work with files from the bash shell prompt. Managing local Linux users and groups Manage Linux users and groups and administer local password policies. Controlling access to files with Linux file system permissions Set access permissions on files and interpret the security effects of different permission settings. Managing SELinux security Use SELinux to manage access to files and interpret and troubleshoot SELinux security effects. Monitoring and managing Linux processes Monitor and control processes running on the system. Installing and updating software packages Download, install, update, and manage software packages from Red Hat and yum package repositories. Controlling services and daemons Control and monitor network services and system daemons using systemd. Managing Red Hat Enterprise Linux networking Configure basic IPv4 networking on Red Hat Enterprise Linux systems. Analyzing and storing logs Locate and interpret relevant system log files for troubleshooting purposes. Managing storage and file systems Create and use disk partitions, logical volumes, file systems, and swap spaces. Scheduling system tasks Schedule recurring system tasks using cron and systemd timer units. Mounting network file systems Mount network file system (NFS) exports and server message block (SMB) shares from network file servers. Limiting network communication with firewalld Configure a basic local firewall. Additional course details: Nexus Humans Enterprise Linux System Admin Fast Track with Exam Prep 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 Enterprise Linux System Admin Fast Track with Exam Prep 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 5 Days 30 CPD hours This course is intended for Senior system administrators who wish to learn more about troubleshooting. Have earned a Red Hat Certified System Administrator (RHCSA) or have similar experience. It is recommend that students have earned a Red Hat Certified Engineer (RHCE) or have similar experience. Overview As a result of attending this course, students should be able to leverage the software development life-cycle process to plan, create, test, and provision host systems within an organization. Students should be able to demonstrate the following skills: - Installation of Red Hat Satellite 6 - Software life-cycle management of software used to provision and maintain configured hosts within a controlled production environment This course enriches your skills by providing the tools and techniques that you need to successfully diagnose, and fix, a variety of potential issues. You will work through hands-on problems in various subsystems to diagnose and fix common issues. You will learn develop the skills to apply the scientific method to a structured form of troubleshooting. You will then apply this approach in troubleshooting various types of problems, including boot issues, hardware issues, storage issues, RPM issues, network issues, third-party application issues, security issues, and kernel issues. At the end of the course, you will be empowered to complete various comprehensive review labs to test your skills. 1 - INTRODUCTION TO TROUBLESHOOTING Describe a generalized strategy for troubleshooting. 2 - TAKE PROACTIVE STEPS TO PREVENT SMALL ISSUES Prevent small issues from becoming large problems by employing proactive system administration techniques. 3 - TROUBLESHOOT BOOT ISSUES Identify and resolve issues that can affect a system's ability to boot. 4 - IDENTIFY HARDWARE ISSUES Identify hardware problems that can affect a system?s ability to operate. 5 - TROUBLESHOOT STORAGE ISSUES Identify and fix issues related to storage. 6 - TROUBLESHOOT RPM ISSUES Identify and fix problems in, and using, the package management subsystem. 7 - TROUBLESHOOT NETWORK ISSUES Identify and resolve network connectivity issues. 8 - TROUBLESHOOT APPLICATION ISSUES Debug application issues. 9 - DEAL WITH SECURITY ISSUES Identify and fix issues related to security subsystems. 10 - TROUBLESHOOT KERNEL ISSUES Identify kernel issues and assist Red Hat Support in resolving kernel issues. 11 - RED HAT ENTERPRISE LINUX DIAGNOSTICS AND TROUBLESHOOTING COMPREHENSIVE REVIEW Practice and demonstrate knowledge and skills learned in Red Hat Enterprise Linux Diagnostics and Troubleshooting.

Duration 4 Days 24 CPD hours This course is intended for #NAME? Overview At the completion of this course, students already familiar with the RHCT/RHCSA administration skills will have exposure to all competencies tested by the RHCSA and RHCE exams. If you are an experienced Linux© system administrator and hold a Red Hat Certified System Administrator (RHCSA©) credential or possess equivalent skills and want to broaden your ability to administer Linux systems at an enterprise level, this is the perfect course.The course will empower you to deploy and manage network servers running caching domain name service (DNS), MariaDB, Apache HTTPD, Postfix SMTP null clients, network file sharing with network file system (NFS) and server message block (SMB), iSCSI initiators and targets, advanced networking and firewall configurations, and to use bash shell scripting to help automate, configure, and troubleshoot your system. Through lectures and hands-on labs, you will be exposed to all competencies covered by the Red Hat Certified Engineer (RHCE) exam (EX300), supplementing what you have already learned in earning your RHCSA credential.This course is based on Red Hat© Enterprise Linux 7. Getting Started with the Classroom Environment Given a virtualized environment, begin to administrate multiple systems using prerequisite skills Enhance User Security Configure system to use Kerberos to verify credentials and grant privileges via sudo Bash Scripting and Tools Automate system administration tasks utilizing Bash scripts and text-based tools File Security with GnuPG Secure files with GnuPG. Software Management Use yum plugins to manage packages and understand the design of packages to build a simple package Network Monitoring Profile running services then capture and analyze network traffic Route Network Traffic Configure system to route traffic and customize network parameters with sysctl Secure Network Traffic Secure network traffic through SSH port forwarding and iptables filtering/network address translation (NAT) NTP Server Configuration Configure an NTP server Filesystems and Logs Manage local file system integrity, monitor system over time, and system logging Centralized and Secure Storage Access centralized storage (iSCSI) and encrypt filesystems SSL-encapsulated Web Services Understand SSL certificates and deploy an SSL encapsulated web service Web Server Additional Configuration Configure web server with virtual hosts, dynamic content, and authenticated directories Basic SMTP Configuration Configure an SMTP server for basic operation (null client, receiving mail, smarthost relay) Caching-Only DNS Server Understand DNS resource records and configure a caching-only name server File Sharing with NFS Configure file sharing between hosts with NFS File Sharing with CIFS Configure file and print sharing between hosts with CIFS File Sharing with FTP Configure file sharing with anonymous FTP Troubleshooting Boot Process Understand the boot process and recover unbootable systems with rescue mode

Duration 2 Days 12 CPD hours This course is intended for This course is designed for technical professionals who need to know how to deploy a Cisco Integrated Threat Defense solution in their network environment. The primary audience for this course includes: Systems and network engineersTechnical architectsTechnical support personnelChannel partners and resellers Overview After completing this course, you should be able to: Describe the current network security landscape and the Cisco Integrated Threat Defense (ITD) solutionDescribe the key components of the ITD solution and their use in the networkConfigure the ISE for a baseline of operation in the ITD solutionConfigure the integration between the Stealthwatch and ISE platformsConfigure the integration between the Cisco Firepower and ISE platformsConfigure the integration between Cisco Firepower and AMP for Endpoints This course begins with an analysis of the current cybersecurity landscape and includes details on why networks today need an integrated threat defense architecture. You will integrate and verify proper operation of the key Cisco Integrated Threat Defense products, including Cisco Identity Services Engine (ISE), Cisco Stealthwatch©, Cisco Firepower© NGFW, and Cisco AMP for Endpoints. Verification includes the introduction of malware into the network to ensure proper identification, analysis, and quarantine. Course Outline Integrated Threat Defense Introduction Itd Products Identity Services Engine Setup Integration Of Stealthwatch With Identity Services Engine Integration Of Firepower With Identity Services Engine Integration Of Firepower With Amp For Endpoints

Duration 4 Days 24 CPD hours This course is intended for The primary audience for this course is as follows: System Engineers Network Engineers Technical Architects Technical Support Personnel Channel Partners Resellers Overview Upon completing the course, the learner will be able to meet these overall objectives: Describe Cisco SD-Access and how it relates to Cisco DNA Orchestrate a Cisco SD-Access solution using the Cisco DNA Center™ orchestration platform Use the Network Data Platform to demonstrate the assurance and analytics capabilities of SD-Access The Deploying Cisco SD-Access (ENSDA) v1.0 course is an instructor-led, lab based, hands-on course that teaches students how to successfully deploy the Cisco© Software-Defined Access (SD-Access) solution within their enterprise networks. The course discusses how Cisco SD-Access fits into the Cisco Digital Network Architecture (Cisco DNA?). It covers SD-Access fundamentals, provisioning, policies, wireless integration, border operations, and migration strategies. Module 1: Cisco SD-Access Overview Lesson 1: Exploring Cisco SD-Access Lesson 2: Describing the Cisco SD-Access Architecture Lesson 3: Exploring Cisco DNA Center Lesson 4: Configuring Underlay Automation Module 2: Cisco SD-Access Implementation Lesson 1: ISE Integration in DNA Center Lesson 2: Policy Provisioning Basics Lesson 3: Navigating and Managing the Policy Application Workflows Module 3: Cisco SD-Access Border Operations Lesson 1: Cisco SD-Access Deployment Models Lesson 2: Connecting the Fabric to External Domains Module 4: Wireless Integration Orchestration Lesson 1: Integrating Wireless with the Cisco SD-Access Solution Lesson 2: Workflow of Cisco SD-Access Wireless Lesson 3: Cisco SD-Access Wireless Network Design Lesson 4: Cisco SD-Access Wireless Basic Operation Module 5: Cisco SD-Access Assurance and Migration Lesson 1: Cisco Network Data Platform Lesson 2: Cisco SD-Access Migration Strategies

Duration 2 Days 12 CPD hours This course is intended for Network engineers, technical support personnel, reseller support engineers, and others responsible for implementing and/or maintaining the Juniper Networks products covered in this course. Overview Introduction to carrier Ethernet Describe the function of an Ethernet LAN Describe Ethernet frame filtering Implement VLAN tagging Implement IRB Implement a virtual switch Describe interconnecting routing instances Describe provider bridging Configure and monitor provider bridging Configure and monitor provider backbone bridging Explain the purpose of the Spanning Tree Protocol (STP) Configure and monitor the STP, the RSTP, the MSTP, and the VSTP Explain the purpose of bridge protocol data unit (BPDU), loop, and root protection Describe the basic operation of link fault management (LFM) Describe the basic operation of connectivity fault management (CFM) Configure and monitor Ethernet OAM Describe and configure Ethernet Ring Protection (ERP) The Junos Service Provider Switching course is a two-day course that provides students with intermediate switching knowledge and configuration examples that are most common in a Service provider implementation. Course Outline Course Introduction Carrier Ethernet Ethernet in the WAN Ethernet Standards Organizations MX Series Layer 2 Features Ethernet Switching and Virtual LANs Ethernet LANs Bridging Configuring and Monitoring VLANs Configuring and Monitoring IRB Layer 2 Address Learning and Forwarding Layer 2 Firewall Filtering Virtual Switches Routing Instances Overview Configuring and Monitoring Virtual Switches Interconnecting Routing Instances Provider Bridging Expanding the Bridged Network Provider Bridging Configuring and Monitoring Provider Bridging Provider Backbone Bridging Configuring and Monitoring Provider Backbone Bridging Spanning-Tree Protocols Overview of STP Overview of RSTP Overview of MSTP Overview of VSTP Configuring and Monitoring Spanning-Tree Protocols Understanding BPDU, Loop, and Root Protection Ethernet OAM OAM Overview LFM CFM Configuring and Monitoring OAM Ethernet Ring Protection ERP Overview Configuring and Monitoring ERP LAG Overview Configuring and Monitoring a LAG

Duration 3 Days 18 CPD hours This course is intended for This course benefits individuals responsible for configuring and monitoring devices running the Junos OS. Overview After successfully completing this course, you should be able to: Describe the basic design architecture of the Junos OS. Identify and provide a brief overview of Junos devices. Navigate within the Junos CLI. Perform tasks within the CLI operational and configuration modes. Restore a Junos device to its factory-default state. Perform initial configuration tasks. Configure and monitor network interfaces. Describe user configuration and authentication options. Perform secondary configuration tasks for features and services such as system logging (syslog) and tracing, Network Time Protocol (NTP), configuration archival, and SNMP. Monitor basic operation for the Junos OS and devices. Identify and use network utilities. Upgrade the Junos OS. Perform file system maintenance and password recovery on a Junos device. Navigate within the Junos J-Web interface. Explain basic routing operations and concepts. View and describe routing and forwarding tables. Configure and monitor static routing. Configure and monitor OSPF. Describe the framework for routing policy and firewall filters. Explain the evaluation of routing policy and firewall filters. Identify instances where you might use routing policy. Write and apply a routing policy. Identify instances where you might use firewall filters. Write and apply a firewall filter. Describe the operation and configuration for unicast reverse path forwarding (RPF). This three-day course provides students with the foundational knowledge required to work with the Juniper Networks Junos operating system and to configure Junos devices. The course provides a brief overview of the Junos device families and discusses the key architectural components of the software. Key topics include user interface options with a heavy focus on the command-line interface (CLI), configuration tasks typically associated with the initial setup of devices, interface configuration basics with configuration examples, secondary system configuration, and the basics of operational monitoring and maintenance of Junos devices. The course then delves into foundational routing knowledge and configuration examples including general routing concepts, routing policy, and firewall filters. Course Outline COURSE INTRODUCTION Junos Operating System Fundamentals The Junos OS Traffic Processing Overview of Junos Devices User Interface Options: The Junos CLI User Interface Options The Junos CLI: CLI Basics The Junos CLI: Operational Mode The Junos CLI: Configuration Mode User Interface Options: The J-Web Interface User Interface Options The Junos CLI: CLI Basics The Junos CLI: Operational Mode The Junos CLI: Configuration Mode Initial Configuration Factory-Default Configuration Initial Configuration Interface Configuration Secondary System Configuration User Configuration and Authentication System Logging and Tracing Network Time Protocol Archiving Configurations SNMP Operational Monitoring and Maintenance Monitoring Platform and Interface Operation Network Utilities Maintaining the Junos OS Password Recovery System Clean-Up Interface Configuration Examples Review of the Interface Configuration Hierarchy Interface Configuration Examples Using Configuration Groups Routing Fundamentals Routing Concepts: Overview of Routing Routing Concepts: The Routing Table Routing Concepts: Routing Instances Static Routing Dynamic Routing Routing Policy Routing Policy Overview Case Study: Routing Policy Firewall Filters Firewall Filters Overview Case Study: Firewall Filters Unicast Reverse-Path-Forwarding Checks Class of Service CoS Overview Traffic Classification Traffic Queueing Traffic Scheduling Case Study: CoS JTAC Procedures Opening a Support Case Customer Support Tools Transferring Files to JTAC Juniper Security Concepts Security Challenges Juniper Networks? Security Focus A IPv6 Fundamentals IPv6 Addressing Protocols and Services Configuration Additional course details: Nexus Humans Juniper - Introduction to the Junos Operating System (IJOS) 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 Juniper - Introduction to the Junos Operating System (IJOS) 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 benefits individuals responsible for configuring and monitoring EX Series switches using Junos ELS. Overview After successfully completing this course, you should be able to: Restrict traffic flow within a VLAN. Manage dynamic VLAN registration. Tunnel Layer 2 traffic through Ethernet networks. Review the purpose and operations of a spanning tree. Implement multiple spanning-tree instances in a network. Implement one or more spanning-tree instances for a VLAN. List the benefits of implementing end-user authentication. Explain the operations of various access control features. Configure and monitor various access control features. Describe processing considerations when multiple authentication and access control features are enabled. Describe some common IP telephony deployment scenarios. Describe features that facilitate IP telephony deployments. Configure and monitor features used in IP telephony deployments. Explain the purpose and basic operations of CoS. Describe CoS features used in Layer 2 networks. Configure and monitor CoS in a Layer 2 network. Describe a basic troubleshooting method. List common issues that disrupt network operations. Identify tools used in network troubleshooting. Use available tools to resolve network issues. This two-day course provides detailed coverage of virtual LAN (VLAN) operations. Chapter 1: Course Introduction Course Introduction Chapter 2: Troubleshooting as a Process Before You Begin The Troubleshooting Process Challenging Network Issues The Troubleshooting Process Lab Chapter 3: Junos Product Families The Junos OS Control Plane and Data Plane Field-Replaceable Units Junos Product Families Lab: Identifying Hardware Components Chapter 4: Troubleshooting Toolkit Troubleshooting Tools Best Practices Lab: Using Monitoring Tools and Establishing a Baseline Chapter 5: Hardware and Environmental Conditions Hardware Troubleshooting Overview Memory and Storage Boot Monitoring Hardware-Related System Logs Chassis and Environmental Monitoring Lab: Monitoring Hardware and Environmental Conditions Chapter 6: Control Plane Control Plane Review System and User Processes Monitoring Routing Tables and Protocols Monitoring Bridging Monitoring the Address Resolution Protocol Lab: Control Plane Monitoring and Troubleshooting Chapter 7: Control Plane Protection Protection Overview DDOS Protection Loopback Filter Lab: Control Plane Monitoring and Troubleshooting Chapter 8: Data Plane ? Interfaces Interface Properties General Interface Troubleshooting Ethernet Interface Troubleshooting Lab: Monitoring and Troubleshooting Ethernet Interfaces Chapter 9: Data Plane ? Other Components Definition of a Data Plane Problem Data Plane Components Data Plane Forwarding Load-Balancing Behavior Firewall Filters and Policers Data Plane Troubleshooting Case Study Lab: Isolate and Troubleshoot PFE Issues Chapter 10: Staging and Acceptance Testing Initial Inspection and Power-on General System Checks Interface Testing Chapter 11: Troubleshooting Routing Protocols Troubleshooting OSPF Troubleshooting BGP Troubleshooting Routing Loops and Route Oscillation Lab: Troubleshooting Routing Protocols Chapter 12: High Availability High Availability Overview Graceful Routing Engine Switchover Graceful Restart Nonstop Active Routing and Bridging Unified In-Service Software Upgrade Chapter 13: Network Monitoring SNMP RMON Telemetry Flow Monitoring Lab: Monitoring the Network Chapter 14: vMX Troubleshooting vMX Overview Troubleshooting Lab: Monitoring vMX Chapter 15: JTAC Procedures Opening a Support Case Customer Support Tools The Content of a PR Transferring Files to JTAC Chapter 16: Automated Support and Prevention Overview Service Now Service Insight Lab: Automated Support and Prevention