Bits & Bytes: Week 5, III-IV - WAN and Wireless Networks

Question 1

This acts like a single network but spans across multiple physical locations

Answer 1

WAN

Question 2

ACRONYM:

WAN

Answer 2

Wide Area Network

Question 3

This is the place where an ISP bridges the gaps by connecting parts of a network that spans a large physical area

Answer 3

Demarcation Point

Question 4

What are two connections used to make local loops?

Answer 4

T-carrier lines and high speed optical connections

Question 5

This is the area between the demarcation point and the ISP’s core network

Answer 5

a Local Loop

Question 6

Where in the network model does WAN work using the layer’s protocols to transport data?

Answer 6

Data Link Layer

Question 7

ACRONYM:

HDLC

Answer 7

High-Level Data Link Control

Question 8

ACRONYM:

ATM (as used in computer networking)

Answer 8

Asynchronous Transfer Mode

Question 9

This type of technology establishes a VPN tunnel between two sites.

Answer 9

Point to Point VPN

Question 10

What is another term for Point to Point VPN?

Answer 10

Site to Site VPN

Question 11

This set of specifications defines WiFi

Answer 11

IEEE 802.11 Specifications

Question 12

This is a certain section of the radio spectrum that’s been agreed upon to be used a specific type of communication

Answer 12

Frequency band

Question 13

What is the frequency band for FM radio?

Answer 13

88 to 108 megahertz

Question 14

What are 5 common 802.11 specifications listed in the order they were adopted?

Answer 14

802.11b, 802.11a, 802.11g, 802.11n, and 802.11ac

Question 15

What are the 2 most common WiFi frequency bands?

Answer 15

2.4 gigaherts and 5 gigahertz

Question 16

What are two reasons for releasing a new version of the 802.11 specifications?

Answer 16

Higher access speeds or the ability for more devices to simultaneously used a network

Question 17

802.11 protocols define how wireless networks operate are which two layers of the networking model?

Answer 17

the Physical and Data Link layers

Question 18

This part of an 802.11 frame is 16 bits long and contains a number of subfields that are used to describe how the frame itself should be processed

Answer 18

frame control field

Question 19

ACRONYM:

WAP

Answer 19

Wireless Access Point

Question 20

A device that bridges the wireless and wired portions of a network

Answer 20

Wireless Access point

Question 21

What are three things that determine which wireless access point a device associates with?

Answer 21

Physical proximity, general signal strength, and wireless interference

Question 22

In an 802.11 frame, there are __ ________ _______ which provide enough room to indicate which Wireless Access Point should be processing the frame

Answer 22

4 address fields

Question 23

In an 802.11 frame, what the first address field? What is is contained in this address field?

Answer 23

The source address is the MAC number of the sending device

Question 24

In an 802.11 frame, what the second address field? What is is contained in this address field?

Answer 24

The intended destination address is the MAC address of the device intended to receive the frame

Question 25

In an 802.11 frame, what the third address field? What is is contained in this address field?

Answer 25

The receiver address is the MAC address of the WAP intended to receive the frame

Question 26

In an 802.11 frame, what the fourth address field? What is is contained in this address field?

Answer 26

The transmitter address is the MAC address of whatever device just transmitted the frame

Question 27

In an 802.11 frame, what field is between the third and fourth address fields? What is is contained in this field?

Answer 27

The sequence control field contains a sequence number used to keep track of the ordering of frames

Question 28

In an 802.11 frame, what field contains all of the data of the protocols further up the stack?

Answer 28

the Data Payload Field

Question 29

In an 802.11 frame, what is the last field of the frame called? What does it contain?

Answer 29

the Frame check sequence field, contains a checksum used for a cyclical redundancy check

Question 30

Networks that operate on the __Ghz band are almost always faster but have less range.

Answer 30

5Ghz band

Question 31

Networks that operate on the __Ghz band are almost always faster but have less range.

Answer 31

2.4Ghz band