Wide-Area Networks

Mind Map by , created about 6 years ago

Intro To Networking Mind Map on Wide-Area Networks, created by pinedaluis8 on 08/02/2013.

Created by pinedaluis8 about 6 years ago
The Internet
Wireless LANs
Ethernet LANs
AS Unit 1 Physics Flashcard Deck
Callum McClintock
1PR101 2.test - Část 20.
Nikola Truong
Transmitting Bits
TCP/IP Transport
TCP/IP Networks
Internet Protocol
Computer Networking
Wide-Area Networks
1 WAN and LAN Topologies
1.1 A hub-and-spoke WAN design, using leased lines, reduces the number of leases lines, while still providing a way for packets to reach all sites.
1.2 Packet-switched services create the possibility of a different topology called a multipoint WAN topology
1.3 A modern WAN point-to-point link uses a 2 pair (4-wire) circuit
2 T-Carrier System and TDM
2.1 Time-division multiplexing divides the time allowed for sending data on the high speed ink, by combining (plex) multiple slower speed channels
2.2 The T-Carrier System used DS0, DS1, and DS3 lines both to customer sites and between COs
2.3 The entire Telco system of using many TDM switches, many trunks, with many customer leased lines does not create a traffic jam of bits trying to move around
3 Telco Services
3.1 A voice call required one analog electrical circuit between the two phones
3.2 2-wire local loop allowed a single electrical circuit into the home, which worked well for voice
3.3 Early telephone companies focused on voice telephone services, not on WAN services
4 Leased-Line WAN Links
4.1 With a leased line, expect to get basic service, the ability to send bits between two devices (typically routers)
4.2 The speeds must be a multiple of some specific number
4.3 A leased line stretches for hundreds or even thousands of miles

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