Goals
- Know the main types of networks and the protocols involved
Program
Network presentation
The different elements and their roles
Users and their needs
Architecture, topology aspects
Network scope: PAN, LAN, MAN and WAN
Organization
Encapsulation principle
Presentation of the 7 layers
Limited and unrestricted media
Twisted pairs
Optical fibers
Wireless links
Repeaters and Hubs
Collision domain and broadcast domain
Bridges and Switches
Broadcast storms
Spanning Tree (principle and operating mode)
Routers: roles and interest
Gateway
Discovery of active elements: LLDP and CDP protocols
Workshop: Using the Wireshark capture software
Notion of WLAN
Topologies
SSID
Communication methods 802.11, 802.11a; b; g; n
Security: WEP, WPA, WPA2, EAP, 802.1x, RADIUS
Media access methods: notion of collision
Collision management: CSMA / CD and CSMA / CA
Concept of MAC address: role and format
MAC address Unicast, Broadcast and Multicast
Ethernet protocol
Format of an Ethernet frame
Ethernet-802.3 protocol and LLC layer
Port aggregation: 802.3ad standard, LACP and PAGP protocols
Workshop: Analysis of Ethernet-802.3 and Ethernet-II frames
Addresses and classes of addresses
Classless addresses : CIDR
Unicast, Broadcast and Multicast
IP / MAC resolution: ARPprotocol
The IP protocol
Format of an IP packet
Workshop: Study of the ARP protocol (interests and risks)
Notions of subnets and CIDR notation
Subnetwork aggregation: VLSM
Workshop: Create subnets / VLSM
Principle
Structure of an ICMP datagram
Examples of use: ping and traceroute
Workshop: Case study of an inaccessible destination
Overview of routing Routing table
Static routing
Dynamic routing
– Principles
– Types of dynamic routing
– Main protocols (OSPF, EIGRP, ISIS, BGP)
Presentation of MPLS
Workshop: Analysis of a routed frame
Duration
3 days
Price
£ 1416
Audience
IT maintenance technician, junior network administrators, system administrators needing to review network fundamentals
Prerequisites
Computer skills
Reference
Re326-F
Principle of VLANs
Types of VLANS
Workshop: 802.1q frame analysis
IPv4 Address Space Issues
Introduction to IPv6
Transport layer protocols: notion of port and socket
UDP- communication in unconnected mode
Structure of a UDP datagram
TCP: communication in connected mode
Principle of establishing a TCP connection
Structure of a TCP segment
Sequence numbers, windows and acknowledgments
The states of a TCP connection
Workshop: Knowing how to use the netstat command
DHCP: Dynamic IP configuration
Structure of a DHCP negotiation
DHCP relay
The other services provided by DHCP
Workshop: Analyzing a DHCP negotiation
Name resolution
Role and interest of DNS
DNS architecture and the different types of DNS servers
Iterative and recursive queries
The DNS name server
– Primary server
– Secondary server
– Zone transfer
DNS records
Zone delegation
DNS query: nslookup and dig utilities
Coupling with DHCP: dynamic updates
Workshop: Analyzing an iterative DNS query
Principles of a VPN
Type of VPN
Main protocols: GRE, PPTP, L2TP, IPSec, SSL / TSL
Security issues
Filtering router
Address / port translator
Proxy
Firewall
DMZ
QOS: Throttling and Shaping
Workshop: Analysis of good practices in filtering
Passing the certification (if provided for in the funding)
Sessions
Contact us for more informations about session date
