Deck 2: Network Standards

Question 1

Most or all messages have trailers.

Answer 1

False

Question 2

Network standards are also called protocols.

Answer 2

True

Question 3

The ________ contains the content being delivered by a message.

A)address field
B)header
C)data field
D)trailer

Answer 3

C

Question 4

If the destination host receives a segment that is incorrect,it will ________.

A)transmit an ACK segment
B)transmit a NAC segment
C)transmit an RST segment
D)None of the above.

Question 5

Standards govern ________.

A)semantics
B)syntax
C)Both A and B
D)Neither A nor B

Question 6

Which of the following is NOT one of the three general parts of messages?

A)Address field.
B)Header.
C)Data field.
D)Trailer.

Question 7

The header is defined as everything that comes before the data field.

Question 8

The side wishing to close a TCP segment sends a(n)________ segment.

A)SYN
B)ACK
C)FIN
D)None of the above.

Question 9

How a message is organized is its ________.

A)syntax
B)semantics
C)order
D)Both A and B

Question 10

In HTTP,a server may initiate an interaction with the client.

Question 11

If the destination host does not receive a segment,it will ________.

A)transmit an ACK segment
B)transmit a NAC segment
C)transmit an RSND segment
D)None of the above.

Question 12

Ethernet addresses are ________.

A)4 octets long
B)6 octets long
C)32 octets long
D)48 octets long

Question 13

After the side wishing to close a TCP connection sends a FIN segment,it will ________.

A)not send any more segments
B)only send ACK segments
C)only send FIN segments
D)None of the above.

Question 14

Messages always have data fields.

Question 15

The meaning of a message is referred to as the message's ________.

A)protocol
B)order
C)value
D)syntax
E)semantics

Question 16

A host will retransmit a TCP segment if ________.

A)it receives an ACK segment
B)it receives a NAC segment
C)it receives an RST segment.
D)None of the above.

Question 17

"Octet" is the same as ________.

A)"bit"
B)"byte"
C)Either A or B,depending on the context.
D)Neither A nor B

Question 18

Host P transmits a SYN to Host Q.If host Q is willing to open the connection,it will transmit a(n)________ segment.

A)ACK
B)SYN
C)SYN/ACK
D)None of the above.

Question 19

Ethernet addresses are ________.

A)32 bits long
B)48 bits long
C)128 bits long
D)None of the above.

Question 20

Headers usually are divided into fields.

Question 21

IP is reliable.

Question 22

To handle internetwork transmission control tasks that IP cannot handle,the IETF created TCP.

Question 23

How long are IP addresses?

A)32 bits.
B)48 bits.
C)20 octets.
D)32 octets.
E)128 bits.

Question 24

Routers make forward decisions based on a packet's source IP address.

Question 25

B7-22-DD-6F-C8-AB is an ________ address.

A)Ethernet
B)IP
C)Either A or B

Question 26

Routers make packet forwarding decisions based on a packet's ________.

A)source IP address
B)destination IP address
C)Both A and B
D)Neither A nor B

Question 27

IP detects errors but does not correct them.Therefore,IP is reliable.

Question 28

UDP checks messages for errors but does not correct them.UDP is ________.

A)reliable
B)unreliable
C)Both A and B
D)Neither A nor B

Question 29

217.42.18.248 is an ________ address.

A)Ethernet
B)IP
C)Either A or B

Question 30

TCP messages are called ________.

A)frames
B)data fields
C)packets
D)segments
E)fragments

Question 31

In an IP header,the first bit in the second row is bit ________.

A)0
B)31
C)32
D)33
E)We cannot say.

Question 32

Which of the following has port numbers in its header?

A)UDP.
B)TCP.
C)Both A and B
D)Neither A nor B

Question 33

Well-known port numbers are associated with ________.

A)applications
B)switches
C)routers
D)None of the above.

Question 34

Ethernet does ________.

A)error detection
B)error correction
C)Both A and B
D)Neither A nor B

Question 35

In an Ethernet frame,the IP packet is carried in the ________ field.

A)source address
B)destination address
C)data
D)frame check sequence
E)None of the above.

Question 36

One-bit fields are called ________ fields.

A)digital
B)binary
C)flag
D)ACK
E)None of the above.

Question 37

Port fields are found in ________.

A)UDP headers
B)TCP headers
C)Both A and B
D)Neither A nor B

Question 38

If the ACK bit is set,the acknowledgement number field MUST have a value.

Question 39

If someone says that a 1-bit flag is set,this means that it is given the value ________.

A)0
B)1
C)Either of the above.
D)Neither of the above.

Question 40

Ethernet detects errors but does not correct them.Therefore,Ethernet is reliable.

Question 41

In HTTP,most response message header fields consist of a keyword,an equal sign,and the value for the keyword.

Question 42

The application layer standard always is HTTP.

Question 43

Converting application messages into bits is called ________.

A)encapsulation
B)encryption
C)encoding
D)conversion

Question 44

How many bytes will it take to transmit "Can you hear me now?" without the quotation marks?

A)5
B)6
C)9
D)10
E)None of the above.

Question 45

What is (are)the well-known port number(s)for HTTP?

A)20 and 21.
B)25.
C)80.
D)None of the above.

Question 46

Binary counting usually begins at 1.

Question 47

What is (are)the well-known port number(s)for FTP?

A)20 and 21.
B)25.
C)80.
D)None of the above.

Question 48

At which layer would you find standards for requesting videos from a video sharing site such as YouTube?

A)Application.
B)Transport.
C)Internet.
D)Data link.
E)All of the above.

Question 49

In HTTP,the end of a header field is indicated by a ________.

A)bit position
B)byte position
C)CRLF
D)colon
E)blank line

Question 50

At which layer would you find file transfer protocol standards for downloading files?

A)Application.
B)Transport.
C)Internet.
D)Data link.
E)All of the above.

Question 51

An HTTP response message has a ________.

A)trailer
B)data field
C)Both A and B
D)Neither A nor B

Question 52

A 5-bit field can represent ________ alternatives.

A)4
B)8
C)16
D)32
E)64

Question 53

Which of the following layers has the most standards?

A)Data link.
B)Internet.
C)Transport.
D)Application.

Question 54

In binary,13 is 1101.What is 14?

A)1110
B)1111
C)Neither A nor B

Question 55

If you have a field with N bits,you can represent N² items.

Question 56

An HTTP request message usually has a ________.

A)header
B)data field
C)Both A and B
D)Neither A nor B

Question 57

Nearly all application standards are simple,like HTTP.

Question 58

What is (are)the well-known port number(s)for SMTP?

A)20 and 21.
B)25.
C)80.
D)None of the above.

Question 59

Which layer has more standards?

A)Internet.
B)Application.
C)Both of the above have about the same number of standards.

Question 60

Increasing an alternatives field length by one bit always doubles the number of alternatives it can represent.

Question 61

Which of the following is a standards agency for OSI?

A)IETF.
B)ITU-T.
C)Both A and B
D)Neither A nor B

Question 62

To represent 65 alternatives,your alternatives field would have to be ________ bits long.

A)4
B)5
C)6
D)7
E)8

Question 63

The OSI ________ layer is designed to handle compression and encryption for applications.

A)application
B)presentation
C)session
D)data
E)All of the above.

Question 64

OSI is dominant at the ________ layer.

A)physical
B)internet
C)Both A and B
D)Neither A nor B

Question 65

________ is placing a message in the data field of another message.

A)Nesting
B)Vertical communication
C)Layering
D)Encapsulation

Question 66

Which of the following is a network standards architecture?

A)ISO.
B)TCP/IP.
C)Both A and B
D)Neither A nor B

Question 67

In what order are standards and standards architectures developed?

A)The standards architecture is developed first.
B)Individual standards are developed first.
C)They are developed simultaneously.

Question 68

The fact that two processes other than physical layer processes cannot communicate directly requires the use of encapsulation.

Question 69

The OSI ________ layer is designed to handle data formatting differences between two computers.

A)application
B)presentation
C)session
D)data
E)All of the above.

Question 70

Which layer process does NOT do encapsulation when an application layer process transmits a message?

A)Physical.
B)Transport.
C)Data link.
D)Internet.
E)All do encapsulation.

Question 71

The OSI ________ layer allows application communication to be restarted at the last rollback point.

A)application
B)presentation
C)session
D)transport
E)All of the above.

Question 72

After the data link layer process does encapsulation,it passes the IP packet to the ________ layer process.

A)physical
B)transport
C)data link
D)application
E)None of the above.

Question 73

What is the dominant network standards architecture in most real firms today?

A)OSI.
B)TCP/IP.
C)Neither A nor B

Question 74

OSI is dominant at the ________ layer.

A)transport
B)internet
C)Both A and B
D)Neither A nor B

Question 75

Network standards architectures break the standards functionality needed for communication into layers and define the functions of each layer.

Question 76

After the internet layer process does encapsulation,it passes the IP packet to the ________ layer process.

A)physical
B)transport
C)data link
D)application
E)None of the above.

Question 77

Which of the following is a network standards architecture?

A)ISO.
B)OSI.
C)Both A and B
D)Neither A nor B

Question 78

A corporate network can use either OSI standards at all layers or TCP-IP standards at all layers,but cannot use OSI standards at some layers and TCP-IP standards at other layers.

Question 79

OSI is dominant at the ________ layer.

A)data link
B)transport
C)Both A and B
D)Neither A nor B

Question 80

A 7-bit field can represent ________ alternatives.

A)14
B)49
C)128
D)256
E)512