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Data Encapsulation — Test Answers

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Why do networks need standards?

A
Standards are what keep packets from deteriorating.
B
because otherwise, networks would collapse more often
C
Standards are what guarantee that the different pieces of network are configured to communicate with one another.
D
because otherwise, the signal-to-noise ratio would be too low
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Why does a bus network need regular hubs if it is to cover very much ground?

A
because otherwise the packets will bounce back and forth from end to end repeatedly
B
because otherwise the signal will fade out
C
because otherwise it would be a ring network
D
because otherwise the signal-to-noise ratio will not be high enough
4

Which of the following describes a network device capable of processing data?

A
node
B
router
C
hub
D
switch
5

Which answer choice correctly distinguishes among the three pieces of data? Piece of data 1 has no footer, but it does have an IP address.Piece of data 2 has no headers.Piece of data 3 has a footer.

A
1 is a frame, 2 is a bit, 3 is a switch.
B
1 is a segment, 2 is a bit, 3 is a packet.
C
1 is data, 2 is a bit, 3 is data.
D
1 is a packet, 2 is data, 3 is a frame.
6

How is a WAN different from a LAN?

A
A WAN is made up of LANs.
B
LANs and WANs together make up a network.
C
LANs require WANs or servers.
D
A LAN is made up of WANs.
7

What is a pin?

A
part of a cable
B
a port
C
part of a connector
D
a NIC
9

Wanda works for a large company. She and her team maintain a set of servers that support their office, and their office is connected to other, distant offices owned by the same company.Which of the following is true?

A
Wanda is a network architect.
B
Wanda is a network engineer.
C
Wanda runs a P2P network.
D
Wanda works in a cloud.
10

Explain what the OSI reference model is and why it is useful.

Answer not available
11

What is a suite, in the context of this unit?

A
a set of protocols operating within a single layer
B
a stack of protocols whose parts have been designed to work together
C
a cluster of nodes operating in the same network
D
a program that allows several computers to access the same set of files
12

Select the four TCP/IP Layers:

A
server
B
application
C
communication
D
Internet
E
network access
F
presentation
G
transport
13

Select the protocol data units.

A
bit
B
pin
C
frame
D
spoof
E
packet
F
data
G
segment
14

What does the term “end-to-end” mean?

A
from user to network
B
from computer to switch
C
from sending point to receiving point in a network
D
from computer to network
15

A network attached storage device is good for _____.

A
backing up data for one computer on the network
B
sharing data across multiple workstations on the same network
C
collecting packets so they can be delivered to the destination in one piece
D
temporarily storing excess packets that would otherwise slow down a pointer
17

Which of the following is not a benefit of using a switch?

A
It is more complex than a router.
B
It is capable of filtering undesired packets.
C
It is more complex than a hub.
D
They direct packets instead of just broadcasting them to the whole network.
18

Select the pieces of information that are added on to data to get it where it is going.

A
MAC address
B
segment
C
IP address
D
sender and receiver port
E
frame
F
bit
G
ethernet
21

Which layer concerns the gateway to the network?

A
application layer
B
data-link layer
C
network layer
D
transport layer
22

What is the use of an NDP?

A
taking an IP address from a network layer and identifying the associated MAC address
B
finding other computers on the network
C
sending an error message if a packet gets lost due to a bad connection
D
identifying pointers at the other end of a network
23

Why is a partial mesh topology more common than a full mesh topology?

A
because that sort of redundancy is expensive
B
because partial mesh networks are much better
C
because it is hard to find cables that have the same standard
D
because full mesh networks have not been useful since the popularization of the Internet
24

Why is the physical layer at the bottom level of a protocol stack?

A
It is not as important.
B
It supports the other layers.
C
It isn’t, it is the top level.
D
It is lowest because users do not use it.
25

UDP stands for

A
user-defined protocol
B
user-defined packets
C
user data packets
D
user datagram protocol

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