Test 3 Study Guide

existencetubNetworking and Communications

Oct 26, 2013 (3 years and 9 months ago)

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CSC 360

Test 3 Study Guide



Test 3 is scheduled for Wednesday, November 10. The test will cover:


Ch
apters: 11,
13, 14, 15, 17, 18,
20,
21


Homework:
11, 12, 13
, 14
, 15, 16


Chapter 11

Explain frequency division multiplexing

Why does each channel in freq
uency division multiplexing have a range of frequencies assigned to it
instead of just one frequency?

Explain time division multiplexing

What is one problem with time division multiplexing?

How is the above problem resolved?


Chapter 13

Describe circuit
-
sw
itching

Define packet
-
switching

What are the three general properties that define a packet switched paradigm?

Explain why packet
-
switching is considered to be a form of
statistical multiplexing

What are the two sublayers of the Layer 2 (Data Link Layer) ?

How many connections are required in a mesh topology with N computers?

What kind of address is used in a LAN?

How many bits are in a MAC address?

Explain: unicast, broadcast, and multicast.

Explain how a computer determines if a packet should be processed
or ignored.

What is the typical frame format?

What is the purpose of byte stuffing?


Chapter 14

Name the three broad approaches to coordinating computer access to a shared medium.

Explain token passing.

Explain CSMA/CD

Explain how access to the shared medi
um in the Aloha system worked.

Explain CSMA/CA



Chapter 15

Know the details of the Ethernet frame format, version 802.3

Describe Thicknet Ethernet

Describe Thinnet Ethernet

Describe Twisted Pair Ethernet

Give an example where the physical and the logical
topology of a network is different

Explain how one is able to add an RJ45 connector to each of a twisted pair cable and keep the wiring in
the line correct





Chapter 17

What is the purpose of a repeater? At what level of the OSI model does it work? What

types of addresses
does it use?

Explain the operation of a bridge.

Explain how a bridge builds its routing table

Explain how a bridged LAN deals with a loop

At what layer of the TCP/IP
model does a bridge operate?

Explain the operation of a switch.

At wha
t layer

of the TCP/IP

model does a switch operate?

What type of addresses does a switch use?

How many internal bridges are in a switch with N ports?


Chapter 18

How is a router like a switch?

How does a router differ from a switch?

What type of addresses d
oes a router deal with?

At what layer of the TCP/IP

model do routers operate at?

Why are routers referred to as “Store and Forward” devices?

What is the name of the algorithm that is used in Link
-
State Routing (SPF)

Given a graph of a WAN, write the Routin
g Table for each router utilizing the default route
feature

Name and describe one commercially available WAN technology that is currently being used in
the US

Are loops a problem with Bridges? Explain

Are loops a problem with switches? Explain

Are loops a
problem with routers? Explain

Contrast link
-
state routin
g with distance
-
vector routing.

Be able to hand trace Dijkstra’s Algorithm given a specific graph, a source node, and the code
for the algorithm.


Chapter 20

Know the five layer model for TCP/IP


Chap
ter 21

Explain the purpose of IP addresses

Describe the IP class system

Explain how you can tell what class an IP address belongs to

What notation is used to denote an IP address?

Explain the need for classless addressing

Know special IP addresses and th
eir use

Suppose you are an ISP tha
t

owns a /22 address block. Show how you would allocate address blocks to
four customers who need addresses for 60 computers each