417 Dele courses in London

LTE training course description This course is designed to give the delegate an understanding of the technologies used within a 3G UMTS mobile network. During the course we will investigate the UMTS air interface and the use of Wideband-Code Division Multiple Access (WCDMA) to facilitate high speed data access, together with HSPA to offer mobile broadband services. We will describe the use of soft handover rather than hard handover procedures and soft capacity sharing. The course includes a brief exploration of the UMTS protocol stack and the use of PDP Context and QoS support features. What will you learn Explain the 3G UMTS architecture. Describe the role of a Drifting & Serving RNC. Explain the use of ARQ & HARQ for mobile broadband. Describe how IMS integrates into the architecture. Describe the use of Media Gateway Controllers. Identify the temporary identities used within 3G UMTS. LTE training course details Who will benefit: Anyone working within the telecommunications area, especially within the mobile environment. Prerequisites: Mobile communications demystified Telecommunications Introduction Duration 2 days LTE training course contents LTE Introduction The path to LTE, 3GPP. LTE to LTE advanced. LTE Architecture The core, Access, roaming. Protocols: User plane, Control plane. Example information flows. Bearer management. Spectrum allocation. LTE technologies Transmission, reception, OFDMA, multiple antenna, MIMO. LTE Air interface Air interface protocol stack. Channels, Resource Grid, cell acquisition. Up and downlink controls. Layer 2 protocols. Cell acquisition Power on, selecting networks and cells. RRC connection. Attach procedure. Mobility management Roaming, RRC_IDLE, RRC_CONNECTED, cell reselection, handover, interoperation with UMTS and GSM networks. Voice and text IMS, QoS, policy and charging.

SIP security training course description A hands-on course covering SIP security. It is assumed that delegates already know SIP as this course focuses purely on the security issues in SIP IP telephony networks. Hands-on practicals follow each major theory session and include use of various SIP security tools such as vomit, sipp, sipsak and sivus amongst others. What will you learn Secure SIP networks Use various SIP security tools SIP security training course details Who will benefit: Technical staff working with SIP. Technical security staff. Prerequisites: SIP for engineers Duration 2 days SIP security training course contents SIP review SIP infrastructure and entities, example SIP session. Hands on Simple SIP network with and without authentication. SIP security attacks DOS attacks, infrastructure attacks, eavesdropping, spoofing, replay, message integrity. Hands on Basic SIP packet capture, infrastructure attacks. SIP tools SIP packet creation: Sivus, SIPsak, PROTOS, SFTF, SIP bomber, SIPp, Seagull, Nastysip. SIP packet generators: SIPNess, NetDude. Monitoring: Wireshark, Cain & Abel, Vomit, Oreka, VoiPong. Scripts and tools: SIP-Fun, Skora.net, kphone-ddos, sip-scan, sip-kill, sip-redirectrtp. Health of different tools. Hands on Generating SIP packets, rebuilding conversations from captured packets, password cracking. VPNs and SIP IPSec, AH, ESP, transport mode, tunnel mode, Pre Shared Keys, Public keys. Hands on SIP calls over IPSec. Secure SIP signaling SIP relationship with HTTP, Deprecated HTTP 1.0 basic authentication, HTTP 1.1 Digest authentication, S/MIME, SIPS, SIPS URI, TLS, DTLS, PKI infrastructures. Hands on SIP with TLS. Secure media streams SRTP, features, packet format, default encryption, default authentication, key distribution. S/MIME, MIKEY, SDP security descriptions. SIP security agreements. Hands on Analysing SRTP packets. Firewalls NAT traversal. Impact of firewall on infrastructure attacks. TLS and firewalls. SIP specific firewalls. Hands on SIP calls through a firewall.

Definitive Puppet training course description Puppet is a framework and toolset for configuration management. This course covers Puppet to enable delegates to manage configurations. Hands on sessions follow all the major sections. What will you learn Deploy Puppet. Manage configurations with Puppet. Build hosts with Puppet. Produce reports with Puppet. Definitive Puppet training course details Who will benefit: Anyone working with Puppet. Prerequisites: Linux fundamentals. Duration 2 days Definitive Puppet training course contents Getting started with Puppet What is Puppet, Selecting the right version of Puppet, Installing Puppet, Configuring Puppet. Developing and deploying Puppet The puppet apply command and modes of operation, Foreground Puppet master, Developing Puppet with Vagrant, Environments, Making changes to the development environment, Testing the new environments with the Puppet agent, Environment branching and merging, Dynamic Puppet environments with Git branches, Summary, Resources. Scaling Puppet Identifying the challenges, Running the Puppet master with Apache and Passenger, Testing the Puppet master in Apache, Load balancing multiple Puppet masters, Scaling further, Load balancing alternatives. Measuring performance, Splay time, Summary, Going further, Resources. Externalizing Puppet configuration External node classification, Storing node configuration in LDAP, Summary, Resources. Exporting and storing configuration Virtual resources, Getting started with exported and stored configurations, Using exported resources, Expiring state resources, Summary, Resources. Puppet consoles The foreman, Puppet enterprise console, Puppetboard, Summary, Resources. Tools and integration Puppet forge and the module tool, Searching and installing a module from the forge, Generating a module, Managing module dependencies, Testing the modules, Developing Puppet modules with Geppetto, Summary, Resources. Reporting with Puppet Getting started, Configuring reporting, Report processors, Custom reporting, Other Puppet reporters, Summary, Resources. Extending Facter and Puppet Writing and distributing custom facts, Developing custom types, providers and functions, Summary, Resources, Complex data structures, Additional backends, Hiera functions in depth, Module data bindings, Hiera examples. Jiera-2, Summary, Resources. Mcollective Installing and configuring Mcollective, testing, Mcollective plugins, accessing hosts with Metadata. Hiera Lists, initial Hiera configuration, Hiera command line utility, complex data structures, additional backends, Hiera functions in depth, module data bindings. Hiera-2.

Introduction to Virtualization course description A comprehensive tour of virtualization. The course concentrates on the actual technologies involved as opposed to any one vendor solution. What will you learn Explain the concepts of virtualization. Partition servers. Create Virtual Machines. Introduction to Virtualization course details Who will benefit: Anyone looking for an introduction to Virtualization. Prerequisites: None. Duration 2 days Introduction to Virtualization course contents Virtualization Concepts What is Virtualisation? What are virtual machines (VMs)? Virtualisation Landscape. Network Virtualisation. Suitability for Organisations. Advantages of deploying Virtualisation. Downsides of deploying Virtualisation. Overview of Virtualisation products. Hypervisors What is a hypervisor? Difference between type 1 and 2 hypervisors. Available hypervisors. Hypervisors and device drivers. Hands on: Installing Oracle VirtualBox on Windows. Creating/Importing/Configuring VMs. Virtualization Hosts Hardware and resource requirements. Installation of the hypervisor. Hands on: Installing Hyper-V role into Windows Server. Creating/Importing/Configuring VMs. Virtual Machines Creating virtual machines. Resource requirements. Settings. Installation of the guest OS. Additional tools/ extensions for hypervisor integration. VM files and their uses. Virtual hard disk and their formats. Hardware pass through. Hands on: Connecting to VMWare ESXi via WebGUI and using ESXi to create/import/configure VMs. VM Snapshots/Checkpoints What is a snapshot? How to use them and how they impact performance? Creating/deleting/merging of snapshots. Hands on: Using ESXi to create/manage snapshots. Command Line use on the Hypervisor Interacting with the hypervisor through the command line. Simple commands to configure the hypervisor and VMs. Simple scripts. Hands on: Connecting to VMWare ESXi via PowerCLI to manipulate VMs and snaphshots. Virtualization Storage Different types of storage: local vs remote. Local and remote storage technologies. Configuring storage. Hands on: Using ESXi to deploy VMs on remote NFS storage. Virtual Networking How is networking done in virtualization environments. What is a virtual switch and vNIC and what are their performance characteristics? NIC teaming and trunking in the virtual world. Port groups and isolation. Physical NICs and their use in virtual switches. Hands on: Using ESXi to create and configure vswitches and networking. Templates and clones What is a template? What is a clone? When to use templates and clones to optimize VM deployment. Migrating/Importing VMs What is migration? Migrating compute and storage. Importing VMs from files or physical machines. Hands on: Using VMWare vCenter Server to clone/ template/migrate VMs, tag resources, create local user accounts and assign permissions. VMs and Backups Taking backups of your VMs. Restoring your VMs from backups. Virtualization and Licensing Different licensing models and costs. Containerization Concepts What is a container and how is it different from a virtual machine. When to use containers. Docker and Kubernetes

Essential GEPON training course description Designed to benefit those requiring an in depth knowledge of the principles and applications of the IEEE Ten Gigabit Ethernet and Gigabit Ethernet Passive Optical Networking and Fibre to the X in NG network applications and their associated equipment, its flexibility and function within a modern transmission network. Using an effective mix of instruction and correlation to theory based learning the delegate will gain a complete understanding of the equipment and the tasks to be undertaken in a real life situation. What will you learn Compare FTTx networks. Compare PON variants. Recognise the GEPON architecture. Explain how GEPON works. Recognise GEPON issues. Essential GEPON training course details Who will benefit: Anyone requiring GEPON knowledge. Prerequisites: Introduction to data communications and networking. Duration 2 days Essential GEPON training course contents FTTN, FTTC, FTTH Single Mode Fibre (SMF) and various types, Multimode Fibre (MMF), Fibre Safety and properties (Dispersion/attenuation), Fibre Reel cables and types, Fibre installation and air blown fibre, Transmitters and receivers - power budget/laser classes, Fibre to the home (FTTH), FTTC (Fibre to the Cabinet), FTTN (Fibre to the node), FTTD (Fibre to the Desk), FFTH Topologies and wavelengths, Active or Passive Optical Network (PON). WDM equipment and GPON OSP design Wavelength considerations, WDM/DWDM/CWDM EDFA optical amplification, AWG (Arrayed Waveguide Grating) splitters, Couplers (splitters) and losses, Optical splitters 1x2, 1x4, 1x8, 1x16, 1x32, 1x64, 2x64. IEEE PON variants Gigabit Ethernet Passive Optical Network (GEPON), Time Division PON (TDM-PON), Wave Division Multiplexing PON (WDM-PON), 1Gbps, 10Gbps, 40Ggps, 100Gbps, Strategies for TDM-PON to WDM-PON migration, Architecture of NG-PON (hybrid WDM/TDM PON), Additional services than triple play. GEPON design GEPON OSP centralized design, GEPON OSP distributed design, GEPON PON splitters x4 x8 x32, Fibre splice trays / fibre cassette trays / fibre enclosures, GEPON field testing /GEPON field installation verification, GEPON physical layer testing, Optical Time Domain Reflectometer (OTDR), Optical power source /Optical power meter, Optical Return Loss (ORL), APON/BPON/GPON/EPON/GEPON/10-GEPON comparison. IEEE 802.3ah GEPON: Ethernet in the first mile IEEE 802.3 options, Optical Ethernet options, Ethernet in the first mile, 1000BASE-LX, 1000BASE-SX, IEEE 802.1Q VLANs, Q-in-Q and MAC-in-MAC. QofS Ethernet TOS and priority methods PCP and DiffServe, Reference model / terminology / architecture, Example of ONT functional blocks, Example of OLT functional blocks, FTTx scenarios, The four switching arrangements for external access network backup. IEEE 802.3av 10-GEPON Physical layer, 10GBASE-SR, 10GBASE-LX4, 10GBASE-ER, 10GBASE-LR, 10GBASESW, 10GBASE-LW, 10GBASE-EW, Enhancement band, Bit rate and wavelengths, Compatibility, Forward error correction. IEEE 802.3ca 25G, 50G and 100G NG-EPON MAC frame structure, Downstream multiplexing / Upstream multiplexing, Media access control and ONU registration, Alarm messages. IEEE 802.3bk extended EPON Laser Types PRX40 and PR40, Reference model. GEPON issues and standards GEPON components OLT / GEPON ONT and examples GEPON management, RG (Residential Gateway), HPNA (Home Phone Network Alliance), Power Line Carrier (PLC), GPON DLNI, G.hn or G.9960 MOCA, FTTH Council certification, Standard for network certification, Qualify for use of the fibre-connected home badge, GEPON frame synchronization to network timing, Direct clock synchronization interface (BITS), Multiservice Access Platform (MSAP), Software planning tool. Superconnected cities / voucher scheme. Ethernet OAM Link monitoring, remote failure indication, Remote loopback.

PMI-ACP® Exam Prep: In-House Training This course builds on the candidates' practical experience of Agile in the workplace to equip them with the broad range of knowledge and skills required for the PMI® Agile Certification exam. It will follow the PMI® requirements and reference the suggested reading list, including the Agile Practice Guide, but will not be limited to those areas. Within the profession and discipline of project management, Agile continues to develop as a significant and important aspect of bringing change to an organization. Where the products of change must be delivered to the business 'on time,' Agile is often the chosen methodology. In addition to equipping candidates for the PMI® Agile Certification examination, this course will also support candidates in taking a more informed and effective role in Agile projects. It will also enable them to take a significant role in encouraging and enabling the organization to become or develop as an Agile environment. What you will Learn You will learn how to: Appreciate the wider aspects of Agile project management tools and techniques Integrate various disciplines within Agile Tailor / customize Agile to suit the needs of different projects Prepare yourself for the PMI® Agile Certification examination Getting Started Introductions Agenda Expectations Foundation Concepts Defining 'Traditional' Project Management Project management parameters The 'traditional' approach to the parameters Strengths and weaknesses of the traditional approach Defining 'Agile' Project Management Project management parameters revisited The 'agile' approach to the parameters Strengths and weaknesses of agile Managing projects with traditional and agile methods Can the two approaches co-exist? Leveraging the benefits of both methods Options for using both methods on a project Avoiding the elephant traps Key aspects of the PMI® Agile Certified Practitioner (PMI-ACP)® Handbook Overview Eligibility requirements Exam information Exam Blueprint Continuing certification requirements Key aspects of the PMI Agile Certification Examination Content Outline Introduction Agile exam content outline Tools and techniques Knowledge and skills Domains and tasks (not examined) An Introduction to Agile and Implementing Agile Definable work vs. high-uncertainty work Project factors that influence tailoring The Agile Manifesto and 12 Principles Agile mindset Agile domains and tasks Agile Tools and Techniques Related to PM 'Hard Skills' Planning, monitoring, and adapting The need for planning, monitoring, and adapting The Agile approach to planning and plans The Agile planning tools and techniques The Agile monitoring tools and techniques The Agile approach to adapting Product quality A definition of 'product quality' Setting the standard for product quality Agile tools and techniques for achieving product quality Risk management A definition of 'risk' What is 'at risk'? The acceptability of risks The Agile tools and techniques for managing risks Agile Tools and Techniques Related to PM 'Soft Skills' The difference between PM 'hard and soft' skills Communications The importance of communications Forms of agile communications Communications within the project Communications from the project Communications to the project Making communications the cultural norm Interpersonal Skills Defining and understanding management Defining and understanding leadership Defining and understanding servant leadership Delegating vs. empowering Playing to people's strengths Overcoming the roadblocks Core Agile Tools and Techniques The philosophy of core Agile tools and techniques Agile estimation Will traditional forms of estimating work for agile? The relationship between estimating and guessing The relationship between estimating and sizing The where, who, and how of agile estimating Agile analysis and design Product analysis and design from a user point of view Product analysis and design from a supplier point of view Product analysis and design from an agile project point of view Value-Based Agile Tools and Techniques The role of value-based tools and techniques in bridging traditional PM with Agile Value-based prioritization Value-based prioritization and agile projects Investment appraisal methods Regulatory driven Customer driven Ranking methods (MMF, MoSCoW) Metrics What should we measure / track? Methods of measuring / tracking Adding value with metrics Process Improvement Value-stream analysis Value-stream mapping Agile Knowledge and Skills Context of Agile Knowledge and Skills vis-à-vis Agile Tools and Techniques Agile Knowledge and Skills Process focused People focused Product focused Project focused Exam Preparation and Course Closure The application process - where are you now? The 'Exam-Focused Journal' - what you still have to do Further preparation - self-study schedule Exam topic review Practice exam Practice exam debrief Course closure

PMI-ACP® Exam Prep This course builds on the candidates' practical experience of Agile in the workplace to equip them with the broad range of knowledge and skills required for the PMI® Agile Certification exam. It will follow the PMI® requirements and reference the suggested reading list, including the Agile Practice Guide, but will not be limited to those areas. Within the profession and discipline of project management, Agile continues to develop as a significant and important aspect of bringing change to an organization. Where the products of change must be delivered to the business 'on time,' Agile is often the chosen methodology. In addition to equipping candidates for the PMI® Agile Certification examination, this course will also support candidates in taking a more informed and effective role in Agile projects. It will also enable them to take a significant role in encouraging and enabling the organization to become or develop as an Agile environment. What you will Learn You will learn how to: Appreciate the wider aspects of Agile project management tools and techniques Integrate various disciplines within Agile Tailor / customize Agile to suit the needs of different projects Prepare yourself for the PMI® Agile Certification examination Getting Started Introductions Agenda Expectations Foundation Concepts Defining 'Traditional' Project Management Project management parameters The 'traditional' approach to the parameters Strengths and weaknesses of the traditional approach Defining 'Agile' Project Management Project management parameters revisited The 'agile' approach to the parameters Strengths and weaknesses of agile Managing projects with traditional and agile methods Can the two approaches co-exist? Leveraging the benefits of both methods Options for using both methods on a project Avoiding the elephant traps Key aspects of the PMI® Agile Certified Practitioner (PMI-ACP)® Handbook Overview Eligibility requirements Exam information Exam Blueprint Continuing certification requirements Key aspects of the PMI Agile Certification Examination Content Outline Introduction Agile exam content outline Tools and techniques Knowledge and skills Domains and tasks (not examined) An Introduction to Agile and Implementing Agile Definable work vs. high-uncertainty work Project factors that influence tailoring The Agile Manifesto and 12 Principles Agile mindset Agile domains and tasks Agile Tools and Techniques Related to PM 'Hard Skills' Planning, monitoring, and adapting The need for planning, monitoring, and adapting The Agile approach to planning and plans The Agile planning tools and techniques The Agile monitoring tools and techniques The Agile approach to adapting Product quality A definition of 'product quality' Setting the standard for product quality Agile tools and techniques for achieving product quality Risk management A definition of 'risk' What is 'at risk'? The acceptability of risks The Agile tools and techniques for managing risks Agile Tools and Techniques Related to PM 'Soft Skills' The difference between PM 'hard and soft' skills Communications The importance of communications Forms of agile communications Communications within the project Communications from the project Communications to the project Making communications the cultural norm Interpersonal Skills Defining and understanding management Defining and understanding leadership Defining and understanding servant leadership Delegating vs. empowering Playing to people's strengths Overcoming the roadblocks Core Agile Tools and Techniques The philosophy of core Agile tools and techniques Agile estimation Will traditional forms of estimating work for agile? The relationship between estimating and guessing The relationship between estimating and sizing The where, who, and how of agile estimating Agile analysis and design Product analysis and design from a user point of view Product analysis and design from a supplier point of view Product analysis and design from an agile project point of view Value-Based Agile Tools and Techniques The role of value-based tools and techniques in bridging traditional PM with Agile Value-based prioritization Value-based prioritization and agile projects Investment appraisal methods Regulatory driven Customer driven Ranking methods (MMF, MoSCoW) Metrics What should we measure / track? Methods of measuring / tracking Adding value with metrics Process Improvement Value-stream analysis Value-stream mapping Agile Knowledge and Skills Context of Agile Knowledge and Skills vis-à-vis Agile Tools and Techniques Agile Knowledge and Skills Process focused People focused Product focused Project focused Exam Preparation and Course Closure The application process - where are you now? The 'Exam-Focused Journal' - what you still have to do Further preparation - self-study schedule Exam topic review Practice exam Practice exam debrief Course closure

Data comms training course description A hands on training course introducing the concepts of data communications, moving on to covering both LAN and WAN technology. Quizzes are used extensively to ensure material has sunk in and to maximise learning time. Hands on sessions ensure that by the end of the course delegates have made cables, built LANS and WANS, configured TCP/IP, switches and routers. What will you learn Use the seven layer model to classify networking buzzwords. Build and troubleshoot Ethernet, LAN/WAN and WiFi networks Explain the difference between switches and routers. Connect networks with routers. Data comms training course details Who will benefit: Anyone who requires a technical introduction to networks. Prerequisites: None. Duration 3 days Data comms training course contents What are networks? What is data communications? What are networks? Types of network, LANs, LAN choices, WANs, WAN choices, PANs, SANs, MANs, connecting networks. Internetworks, the internet, clouds. Networks and standards Standards bodies, ISO, ITU, IEEE, IETF, OSI 7 layer reference model, TCP/IP and OSI, ping and the 7 layer model, encapsulation, fragmentation. The physical layer Transmission media: Copper, Fibre, RF, UTP, Cat 5/5e/6/7..., RJ45, straight and cross over cables. Coax, Fibre cable & connectors, SFP, MMF, SMF, radio spectrum, frequencies, ranges, noise and electrical distortion, repeaters. Hands on Cabling, ping. Bandwidth Definition, Bits, bytes, speeds, simplex, half/full duplex, a/symmetrical, aggregation, latency. Calculating bandwidth requirements. The Data Link layer Frames, classifications, standards, LAN/WAN layer 2 technologies (Point to point, virtual circuits). Ethernet What is Ethernet? 802.3, evolution from CSMA/CD, choosing cables, topologies, NICs, MAC addresses. Ethernet frame format. Hands on Analysing Ethernet frames. Ethernet switches Connecting multiple devices, switches work at layer 2, Switches vs. hubs, simultaneous conversations, full duplex, MAC address database, how switches work, switch benefits, loops, STP. Console ports. Hands on Switches and WireShark, configuring switches, broadcast storms, STP. VLANS What are VLANs, why have VLANs. Hands on The effect of VLANs on network traffic. Wireless LANs Type of wireless network. WiFi, 802.11b/g/n/ac, WiFi6, antennae, interference, 802.11 frame format, CSMA/CA, half duplex, Wireless Access Points, security. Hands on Building a WiFi network. WANS WAN architecture, WAN types, service providers, access equipment, DTE, DCE, core equipment, WANs and the 7 layer model, choosing a WAN. WAN access Point to point, multi access, Internet, phone lines, leased lines, xDSL, broadband architecture. DOCSIS, FTTH, PON, SD-WAN. Older technologies (if required): Modems, ISDN, 64k, E1, TDM. Packet switched networks Packet switching, virtual circuits, Hub & spoke, partial & full mesh, MPLS, MPLS and routers, Why MPLS? MPLS -TE, MPLS VPN, Internet VPN. Older technologies (if required). Service provider technologies Transport plane, SDH, SONET, WDM, CWDM, DWDM, DWDM architectures, OTN. TCP/IP Definition, protocols, services, internetworking, the Internet, intranets, IAB, RFCs, IP header, IP addressing, subnet masks, IPv6, TCP, UDP. Hands on IP address and subnet mask configuration. Routers What are routers? Routers vs switches, when to route and when to switch, default gateways, routing tables, static routes, routing protocols. Firewalls, how firewalls work. Hands on Router configuration, tracert. Applications Clients, servers, web, HTTP, Email, resource sharing, IM, VoIP, Video over IP, terminal emulation, ftp, ssh. Hands on telnet

This three-day investigation and interviewing skills course is an advanced course designed specifically for specialist investigators or those who undertake investigations on a full-time basis.

Intro to SQL training course description A hands on course focusing on the use of SQL. In particular this course does not concentrate on any particular version of SQL but rather enables delegates to recognise the differences found in SQL on different platforms. What will you learn Explain the difference between standard SQL and different flavours. Use SQL statements to query databases. Use SQL statements to define databases. Intro to SQL training course details Who will benefit: Anyone working with databases. Prerequisites: None. Duration 2 days Intro to SQL training course contents What is SQL? What is SQL? History, standards, What is SQL used for? Dialects, ANSI SQL, PL/SQL, Transact SQL, front ends. Database basics RDBMS, Tables. Hands on Investigating a database. Basic SQL commands SQL Overview: SQL DML, SQL DDL, SQL queries. SELECT, WHERE and ORDER BY clauses. Combining conditions. IN, LIKE and BETWEEN. Hands on Querying a database from existing tables. SQL data retrieval Scalar functions. Hands on Selecting data from an existing database. More SQL data retrieval Scalar functions, variations. Aggregate functions, GROUP BY. HAVING. Hands on Selecting data from an existing database. Table joins Multiple tables, joins, keys, inner joins, left joins, right joins. Hands on Selecting data from an existing database. SQL basic data manipulation INSERT, UPDATE, MERGE, DELETE. Transaction controls: COMMIT, ROLLBACK. Hands on Modifying data in tables. SQL Data Definition USE, CREATE, DROP, TRUNCATE, ALTER. Hands on Managing new tables and columns. Data control GRANT, REVOKE. Hands on Defining permissions.