1. Essentials of Networking
Chapter 20

2. Roles Hosts Play in Networks
Server
Web
File
Database
Print
Client
Browser
Application

3. Requirements for Networking
Something that defines and standardizes the design and operation of cabling, network cards, and the interconnection of multiple computers
An addressing method that enables clients to find servers and enables servers to send data to clients, no matter the size of the network
Some method of sharing resources and accessing those shared resources

4. Networking Technology
Frames and NICs
Network interface controllers
Media access control (MAC), 48 bits
Cyclic redundancy check (CRC)
Frame
Destination MAC, sending MAC, data, CRC
Ethernet
The current standard for most networks
10BaseT, 100BaseT, 1000BaseT

5. Ethernet Ethernet Star Bus Switch as a central hub
Unshielded Twisted Pair (UTP)
CAT levels, Table 20-1
Shielded Twisted Pair (STP)

6. Ethernet Ethernet with Twisted Pair Limits Connectors
10BaseT – CAT 3
100BaseT – CAT 5
1000BaseT – CAT 5e
Connectors
RJ-11, RJ-45
Table 20-2
Plenum Versus PVC Cabling
Fire hazard, fumes
Crossover Cables
Connect two computers directly

7. Ethernet Ethernet with Alternative Connections Fiber optic
Multimode and Single-Mode

8. Implementing Ethernet
The Typical LAN
Broadcast domain
Wi-Fi
Ethernet over Power
bridge
Structured Cabling
Figures 20-20, 20-21
Horizontal cabling
Solid core vs stranded core
Telecommunications room
Equipment racks
Patch panel and cables
Going Wide