Network : Fundamentals + Scenarios

network icon

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 expanses: 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: ARP
protocol 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

5 days

Price

£ 2174

Audience

IT maintenance technician, junior network administrators, system administrators needing to review network fundamentals

Prerequisites

Computer skills

Reference

Re446-F

Principle of VLANs
Types of VLANS

Workshop: 802.1q frame analysis

IPv4 Address Space Issues
Introduction to IPv6

Transport layer protocols: notion of
UDP port and socket – 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

Reminder of the bases with a simple routing solution
Addition of static route (s)
Attempt to access the Internet: problem, analysis and resolution

Using private address ranges
Implementing NAT
Installing a web server on the LAN
Implementing PAT

Detection of malfunction
Analysis of the process
Proposed corrections
Implementation of corrections

Passing the certification (if provided for in the funding)

Sessions

Contact us for more informations about session date

Culturally rich and interactive concrete example. Adapted pace to see all the points on the 3 days of training and good correspondence with my professional needs. Trainer : good interaction of the course and good way of explaining the different points with simple and concrete examples.
David vs.
David vs.
I am very satisfied with the course. One point to improve from my point of view however would be the balance between theory and practice of the course. I would have appreciated a little more theory but the confrontation with the practice was nevertheless enriching!
Aurélie B.
Aurélie B.
I thought that there would be more notions on the constitution of field level networks, but the training followed is a very interesting prerequisite.
Frédéric B.
Frédéric B.
Friendly. Very good setting, good atmosphere between trainer and trainees, conviviality around the coffee table, a trainer available to listen who meets all the needs I had, only positive.
Joan G.
Joan G.
Just the essentials available. Good support for the courses as well as good technical documentation for the rest of my career. Well adapted to my pace as well as to my level. Trainer : Subject fully mastered, also adapts very well to his interlocutor.
Cyril B.
Cyril B.
Very well structured and very complete course. Corresponds exactly to the needs of my project. One of the best trainers that I have known throughout my life in terms of skills, sympathy, pedagogy and kindness. I really appreciated the professional and human qualities of the trainer
Stéphane O.
Stéphane O.
Trainer: Good interpersonal skills and mastery of network subjects, virtualization. The host is listening.
Stephane S.
Stephane S.
Very good working environment. I would have liked the training to be a little more advanced and with more practical exercises. Very attentive trainer, available. It adapted to my professional needs in relation to training.
Samira B.
Samira B.
Very good training, good pace. It was an advantage for us that the training was carried out in our premises.
Sandrine L.
Sandrine L.
High-performance equipment and well-adapted paper course material are made available to the trainee. Very friendly trainer, speeches and lessons very easy to follow. Very informative and enriching training at all levels. General atmosphere very friendly and very pleasant.
Daniel C.
Daniel C.
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