Networking Exam 2 Ch 4.5

Front 1

bus

Back 1

when a computer transmits, it broadcasts to all other computers; used for wireless WANs and LANs

Front 2

complex/hybrid

Back 2

use different basic topologies in different parts of the network

Front 3

Leased Line Topologies

Back 3

- Full Mesh
- Hub-and-Spoke
- Mixed Design (most networks use this)

Front 4

full mesh

Back 4

provides direct connections between each pair of sites; leased line between every pair; very reliable and very expensive

Front 5

Hub-and-Spoke

Back 5

only one leased line from hub site to the other sites; inexpensive and unreliable; if one site goes down, the others cannot communicate

Front 6

momentary traffic peaks

Back 6

Normally, network capacity is higher than the
traffic. Sometimes, however, there will be ________ above the network’s capacity — usually for a fraction of a second to a few seconds.

Front 7

This congestion causes latency because

Back 7

_________ switches and routers must store frames and packets waiting to send them out; Buffers are small, so packets are often lost.

Front 8

overprovisioning

Back 8

providing far more capacity than the network normally needs; avoids nearly all momentary traffic peaks but
is wasteful.

Front 9

priority

Back 9

assigns high-priority to latency-intolerant applications while low-priority traffic must wait; more efficient than overprovisioning, but more labor-intensive.

Front 10

QoS Guarantees

Back 10

reserved capacity for some traffic, so this traffic always gets through. Other traffic, however, must fight for the remaining capacity.