Deck 9: Tcp/ip Transport Layer Protocols

Question 1

When the Protocol field of an IP header contains the value 17 (0x11), the UDP header follows the IP header.
Indicate the answer choice that best completes the statement or answers the question.

Answer 1

True

Question 2

The initial sequence number used in a TCP connection is defined by the which of the following and, for security purposes, should be randomly assigned?

A)host
B)packet
C)port
D)segment

Answer 2

A

Question 3

TCP keep-alives are enabled by default on Windows XP, Windows Vista, Windows 7, Windows Server 2003, and Windows Server 2008, although any application may disable TCP keep-alives, if desired by its programmer.

Answer 3

False

Question 4

Which of the following defines the length of the packet from the UDP header to the end of valid data (not including any data link padding, if padding is required)?

A)Checksum field
B)Dynamic Port Number field
C)Length field
D)Destination Port Number field

Question 5

Which of the following is detected whenever three or more duplicate ACK packets (known as a triple-ACK) or timeout events occur, and timeout events are considered more serious than duplicate acknowledgments?

A)Logical connection
B)Congestion
C)Retransmission
D)Windowing

Question 6

UDP is the only connectionless TCP/IP protocol at the Transport layer.

Question 7

What is used in order for TCP hosts to create a virtual connection with each other?

A)sliding window
B)handshake process
C)teardown sequence
D)retry mechanism

Question 8

The TCP connection termination process requires how many packets?

A)one
B)two
C)three
D)four

Question 9

Which of the following processes guarantees that packets are ordered properly and protects against missing segments?

A)watchdog
B)keep-alive
C)handshake
D)sequence and acknowledgment

Question 10

Dynamic ports are used as which of the following for specific communications while they are underway?

A)temporary ports
B)core services
C)byte streams
D)lost segments

Question 11

Which of the following does TCP support, which is defined as the process of sending numerous data packets in sequence without waiting for an intervening acknowledgment?

A)retries
B)sequence number tracking
C)windowing
D)error recovery

Question 12

Once a TCP connection is established, which of the following can maintain the connection when there is no data sent across the wire?

A)watchdog process
B)core service
C)keep-alive process
D)handshake process

Question 13

UDP offers connection-oriented services with sequencing, error recovery, and a sliding window mechanism.

Question 14

TCP half-open connections occur when the handshake process does not end successfully with a final ACK.

Question 15

Which of the following does TCP support, which is a management method for data transmission used to determine the amount of unacknowledged data that can go out on the wire from any sender?

A)congestion mechanism
B)retry mechanism
C)sliding window mechanism
D)watchdog mechanism

Question 16

When an out-of-order data segment is received, the Fast Retransmit process requires the receiver to immediately send which of the following?

A)duplicate ACKs
B)core services
C)byte streams
D)lost segments

Question 17

Overloading a receiver occurs when the number of data bytes is greater than which of the following?

A)advertised window
B)bandwidth
C)sliding window
D)ephemeral port

Question 18

Which of the following is a simple protocol that is used by applications that contain their own connection-oriented timeout values and retry counters, similar to those provided by TCP?

A)UDP
B)DoS
C)RTO
D)MSS

Question 19

Which of the following is caused when enough data is sent to a TCP host to fill its receiver buffer, thereby putting the receiver in a zero-window state.

A)DoS
B)Silly Window Syndrome
C)Time Wait delay
D)Retransmission timeout

Question 20

The Fast Recovery process dictates that when a host receives three duplicate ACKs, it must immediately start retransmitting which of the following without waiting for the retransmission timer to expire.

A)duplicate ACKs
B)core services
C)byte streams
D)lost segments

Question 21

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
a method for determining when to stop resending data across packets

Question 22

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
the process of following the current sequence number sent by a TCP peer and sending an acknowledgment value to indicate the next-expected sequence number

Question 23

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
a method stating that when small packets are sent but not acknowledged, no further packets shall be sent

Question 24

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
notification of successful receipt of data

Question 25

A protocol that offers no built-in error-checking or retransmission capability uses which type of packet delivery?

A)low performance
B)connection-oriented
C)best-effort
D)high priority

Question 26

Which of the following is used to indicate that the host completed a transaction?

A)Reset flag
B)FIN flag
C)SYN flag
D)URG flag

Question 27

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
the process of acknowledging multiple packets with a single acknowledgment

Question 28

Which of the following is the overloading of the network or a receiver?

A)Sequence number tracking
B)Buffering
C)Congestion
D)Windowing

Question 29

The ____________________ pseudo-header consists of three fields taken from the IP header: the IP Source Address field value, the IP Destination Address field value, and the Protocol field value.

Question 30

By default, Windows Vista, Windows 7, and Windows Server 2008 support a port range of 49152 to which port number?

A)55874
B)58314
C)61000
D)65535
Enter the appropriate word(s) to complete the statement.

Question 31

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
an amount of time that a TCP host must not use connection parameters after closing down that connection

Question 32

Because of ____________________'s end-to-end reliability and flexibility, it is the preferred transport method for applications that transfer large quantities of data and require reliable delivery services.

Question 33

____________________ defines the range of numbers that identifies dynamic ports.

Question 34

TCP has four defined congestion control mechanisms to ensure the most efficient use of ____________________ along with quick error and congestion recovery.

Question 35

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
a port that is used for the duration of the connection

Question 36

Which of the following provide the simplest kind of transport services because they simply package messages, taken as is from the TCP/IP Application layer, into datagrams?

A)Core services
B)Port numbers
C)Logical connections
D)Connectionless protocols

Question 37

Which of the following defines the destination application or process that uses the IP and UDP headers?

A)Checksum field value
B)Dynamic Port Number field value
C)Length field value
D)Destination Port Number field value

Question 38

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
the timer that maintains the RTO value

Question 39

The ____________________ window is always the lesser of what the network and receiver can handle.

Question 40

Match each item with a statement below.
a.timeout mechanism
b.temporary port
c.Time Wait delay
d.TCP buffer area
e.retransmission timer
f.Nagle algorithm
g.Sequence number tracking
h.acknowledgment
i.windowing
a queuing area used to hold incoming and outgoing TCP packets

Question 41

Briefly describe the TCP startup connection process.

Question 42

What is the difference between the window size field and the urgent pointer field?

Question 43

What is the order of the half-open connection communication sequence?

Question 44

List the two TCP control mechanisms, as defined in RFC 5681.

Question 45

Briefly discuss the type of tasks typically handled by connectionless protocols.

Question 46

List the fields contained in the UDP header.

Question 47

Briefly define the following TCP flag settings: URG (Urgent), ACK (Acknowledgment), and PSH(Push).

Question 48

Briefly discuss four limitations of UDP.

Question 49

Briefly describe the following TCP connection states: LISTEN, SYN SENT, SYN RECD, AND CLOSE WAIT.

Question 50

What are the functions of a connection-oriented protocol?