Fundamentals of TCP/IP Transport and Applications

Question 1

Function that allows receiving hosts to choose the correct application for which the data is destined, based on the port number

Answer 1

Multiplexing using ports (TCP and UDP)

Question 2

Process of numbering and acknowledging data with Sequence and Acknowledgment header fields

Answer 2

Error recovery (reliability) (TCP)

Question 3

Process that uses window sizes to protect buffer space and routing devices from being overloaded with traffic

Answer 3

Flow control using windowing (TCP)

Question 4

Process used to initalize port numbers and Sequence and Acknowledgment fields.

Answer 4

Connection establishment and termination (TCP)

Question 5

Continuous stream of bytes from an upper-layer process that is “segmented” for transmission and delivered to upper-layer processes at the receiving device, with the bytes in the same order.

Answer 5

Ordered data transfer and data segmentation (TCP)

Question 6

The message created by TCP that begins with the TCP header, followed by any application data, is called what?

Answer 6

TCP segment or Layer 4 PDU or L4PDU

Question 7

What is a destination port?

Answer 7

A system that TCP and UDP uses in their header that distinguishes what application will recieve a packet of data based on the destination port number.

Question 8

Multiplexing relies on a concept called a socket. What does a socket consit of?

Answer 8

An IP address
A transport protocol
A port number

Question 9

Hosts typically allocate _______ ______ ______ starting at 1024 because the ports below 1024 are reserved for well-known applications.

Answer 9

dynamic port numbers

Question 10

_______ _______ ______ _______ is an application layer protocol used specifically for network device management.

Answer 10

Simple Network Management Protocol (SNMP)

Question 11

________ ________ refers to the process of initializing sequence and acknowledgment fields and agreeing on the port numbers used.

Answer 11

Connection Establishment

Question 12

A protocol that requires an exchange of messages before data transfer begins, or that has a required preestablished correlation between two endpoints.

Answer 12

Connection-oriented protocol

Question 13

A protocol that does not require an exchange of messages and that does not require a preestablished correlation between two endpoints.

Answer 13

Connectionless protocol

Question 14

The volume of bits per second needed for the application to work well; it can be biased with more volume in one directio, or balanced.

Answer 14

Bandwith

Question 15

The amount of time ti takes one IP packet to flow from sender to reciever.

Answer 15

Delay

Question 16

The variation in delay

Answer 16

Jitter

Question 17

The percentage of packets discarded by the network before they reach the destination, which when using TCP, requires a restransmission.

Answer 17

Loss

Question 18

The URL can be broken into three parts:

Answer 18

• The protocol is listed before the //.
• The host name is listed between the // and the /.
• The name of the web page is listed after the /.

Question 19

Which of the following is not a feature of a protocol that is considered to match OSI Layer 4?

a. Error recovery
b. Flow control
c. Segmenting of application data
d. Conversion from binary to ASCII

Answer 19

d. Conversion from binary to ASCII

Question 20

Which of the following header fields identify which TCP/IP application gets data received by the computer? (Choose two)

a. Ethernet Type
b. SNAP Protocol Type
c. IP Protocol
d. TCP Port Number
e. UDP Port Number

Answer 20

d. TCP Port Number

e. UDP Port Number

Question 21

Which of the following are typical functions of TCP? (chosse four)

a. Flow Control (windowing)
b. Error recovery
c. Multiplexing using port numbers
d. Routing
e. Encryption
f. Ordered data transfer

Answer 21

a. Flow Control (windowing)
b. Error recovery
c. Multiplexing using port numbers
f. Ordered data transfer

Question 22

Which of the following functions is performed by both TCP and UDP?

a. Windowing
b. Error recovery
c. Multiplexing using port numbers
d. Routing
e. Encryption
f. Ordered data transfer

Answer 22

c. Multiplexing using port numbers

Question 23

What do you call data that includes the Layer 4 protocol header, and data given to Layer 4 by the upper layers, not including any headers and trailers from Layers 1 to 3? (choose two)

a. L3PDU
b. Chunk
c. Segment
d. Packet
e. Frame
f. L4PDU

Answer 23

c. Segment

f. L4PDU

Question 24

In the URL http://www.certskills.com/ICND1, which part identifies the web server?

a. http
b. www.certskills.com
c. cerskills.com
d. http://www.certskills.com
e. The file name.html includes the host name

Answer 24

b. www.certskills.com

Question 25

When comparing VoIP with an HTTP-based mission-critical business application, which of the following statements are accurate about the quality of service needed from the networks? (choose two)

a. VoIP needs better (lower) packet loss.
b. HTTP needs less bandwith
c. HTTP needs better (lower) jitter.
d. VoIP needs better (lower) delay.

Answer 25

a. VoIP needs better (lower) packet loss.

d. VoIP needs better (lower) delay.