Ch3 Chapter Summary

Question 1

A networks topology describes?

Answer 1

How computers connect to each other in the network. The most common topologies are BUS, RING, STAR & MESH

Question 2

In a bus topology

Answer 2

All computers connect to the network via a a main line. The cable must be terminated at both ends to prevent signal reflections.

Question 3

I a ring topology

Answer 3

All computers on the network attach to a ring of cable. A single break in the cable stops the flow of data through the entire network.

Question 4

In a star topology

Answer 4

The computers on the network connect to a central wiring point, which provides fault tolerance.

Question 5

Networks turned to two hybrid topologies

Answer 5

Star-bus and star ring many years ago. Star-bus is overwhelmingly the most common topology used today.

Question 6

In a mesh topology

Answer 6

Each computer has a dedicated line to every other computer. Mesh networks can be further categorized as partially meshed or fully meshed, both of which require a significant amount of physical cable.

Question 7

Ina point-to-multipoint topology

Answer 7

A single system acts as a common source through which all members of the network converse

Question 8

Mesh and point-to-multipoint topologies

Answer 8

Are common among wireless networks

Question 9

In a point to point technology

Answer 9

Two computers connect directly together

Question 10

Copper cabling comes in two forms

Answer 10

Coaxial and twisted pair

Question 11

Coaxial or coax

Answer 11

Shields data transmission from EMI, coax was swirled used in early bus networks and it used BNC connectors. Today it’s mostly used to connect cable modems to ISP

Question 12

Coax Cable have an RG rating

Answer 12

With RG-6 being the predominantly coax today

Question 13

Twisted pair, which comes in shielded or unshielded

Answer 13

Is the most common type of networking cable today. UTP (unshielded twisted pair) is less expensive and more popular than STP(shielded twisted pair) but it does not offer any protection from EMI

Question 14

UTP - unshielded twisted pair - is categorized by its CAT rating

Answer 14

With CAT5, CAT 5E, CAT 6 and cat 6a being the most commonly used today.

Question 15

Telephones use

Answer 15

RJ-11 connectors, whereas UTP uses RJ-45 connectors

Question 16

Fiber optic cabling transmits

Answer 16

Lights instead of the electricity used in CAT cable or Coax. It is thin and more expensive, yet less flexible and more delicate, then other types of network cabling.

Question 17

There are two types of fiber optic cables based on what type of light is used.

Answer 17

LEDs require multimode cable, whereas lasers generally require single-mode cable.

Question 18

All fiber optic cable has three parts:

Answer 18

The fiber itself, the cladding(which covers the fiber and helps reflect down the fiber) and the outer insulating jacket.

Additionally, there are over one hundred types of connectors for fiber-optic cable, but ST, SC, LC, and FC are the most common for computer networking.

Question 19

Plenum-rated UTP

Answer 19

Is required by most cities for network installations.

Question 20

What cables may be used to network two computers directly together?

Answer 20

Serial cables adhering to RS-232 standard and parallel cables adhering to the IEEE-1284 standard.

Question 21

Networking standards are

Answer 21

Established and promoted by the institute of electrical and electronics engineers or IEEE

Question 22

The IEEE 802 committee

Answer 22

Defines frames, speeds, distances, and types of cabling to use in networks. IEEE 802 is split into several subcommittees, including IEE802.3 and IEEE 802.11