Chapter 7 Networking Concepts

Question 1

Host

Answer 1

Any device that sends or receives data in a network

Question 2

Switch

Answer 2

Connects multiple devices to a network

Question 3

Wireless router

Answer 3

Connects multiple devices to the network

Question 4

Access point

Answer 4

Provides wireless connectivity with less features than a router

Question 5

Modem

Answer 5

Connects a home or office to the internet

Question 6

Copper cabling

Answer 6

Uses electrical signals to transfer data between devices

Question 7

Fiber optic cabling

Answer 7

Uses gods or plastic fiber to carry info such as light pulses

Question 8

Wireless connection

Answer 8

Uses radio signals, infrared tech or satellite transmission

Question 9

Latency

Answer 9

Amount of time it takes data to travel from one location to another

Question 10

Simplex

Answer 10

Simple one way transmission

Question 11

Half duplex

Answer 11

When data flows in one direction at a time

Question 12

Full-duplex

Answer 12

When data flows in both directions at the same time

Question 13

LAN

Answer 13

Small area network

Question 14

WLAN

Answer 14

Wide are network

Question 15

PANS

Answer 15

Personal area network

Question 16

MAN

Answer 16

Metropolitan area network

Spans across a campus or a city

Question 17

P2P network

Answer 17

Each device has equivalent capabilities

Hard to manage and secure

Question 18

OSI reference model

Answer 18

Physical
Data link
Network 
Transport
Session
Presentation
Application

Question 19

TCP/ip model

Answer 19

Application
Transport
Internet
Network access

Question 20

Terms for pdus at layers

Answer 20

Data-application layer
Segment-transport layer PDU
Packet-network layer pdu 
Frame-data link layer pdu
Bits-physical layer pdu

Question 21

Terms for CSMA/CD

Answer 21

Carrier- medium to transmit data
Sense-each devices listens to ensure it is clear to send
Multiple access- can be used by different devices at once
Collision detection-causes a doubling of voltage on the wire

Question 22

Two types of authentication introduced in the original 802.11 standard

Answer 22

Open system authentication-any wireless device can connect

Shared key authentication-allows data to be authenticated and encrypted

Question 23

3shared key authentication techniques for WLAN

Answer 23

WEP
WPA
WPA 2

Question 24

WEP

Answer 24

Wired equivalent privacy- original specification where encryption keys never change

Question 25

WPA

Answer 25

WiFi protected access | Uses WEP but secures data with much stronger temporal key integrity protocol(TKIP)

Question 26

WPA 2

Answer 26

Uses the Advanced Encryption Standard(AES) | Current industry standard

Question 27

Three basic types of modems

Answer 27

Analog phone line Digital subscriber line Cable modem

Question 28

Hub

Answer 28

Recieves data on one port and sends it to all other ports on a network Extends reach of network by regenerating electrical signal

Question 29

Bridges

Answer 29

Divides lan into segments | Keeps record of each device in a segment

Question 30

Switches

Answer 30

Replaced hubs and bridges Microsegment a lan by sending data only to device it was sent Uses a switching table which lists all Mac addresses in network

Question 31

Routers

Answer 31

Connect networks using up address to send data to other networks

Question 32

Hardware firewall

Answer 32

Protects data and equipment on a network from unauthorized access by determining what is permitted on the network and what isn’t

Question 33

Coaxial cables

Answer 33

Uses either copper or aluminum | Carries data in form of electric signals

Question 34

Twisted pair cables

Answer 34

Uses twisted copper cabling to prevent cross talk | Unshielded twisted pair does not protect against emi

Question 35

Twisted pair wiring schemes

Answer 35

T568a and t568b

Question 36

Order for t568a

Answer 36

``` Green twist Green Orange twist Blue Blue twist Orange Brown twist Brown ```

Question 37

Order for t568b

Answer 37

``` Orange strip Orange Green strip Blue Blue stripe Green Brown stripe Brown ```

Question 38

Types of fiber media

Answer 38

Single mode fiber-uses single core tech and sends one beam at a time Multi mode fiber- consists of a larger core and uses led emitters to send light pulses