Essentials of Networking Chapter 20

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

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

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

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

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

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

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