Final

Show the original (unabbreviated) form of the following IPv6 address: 0:23::0

0000 : 0023 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000

Show the original (unabbreviated) form of the following IPv6 address: ::2

0000 :0000:0000:0000:0000:0000:0000:0002

Decompress the following address and show the complete unabbreviated IPv6 address: ::2222

0000:0000:0000:0000:0000:0000:0000:2222

Show the unabbreviated colon hex notation for the following IPv6 address: An address with 64 0s followed by 32 two-bit (01)s. (Please don't use any extra spaces in your result.)

0000:0000:0000:0000:5555:5555:5555:5555

Show abbreviation for the following IPv6 address: 0000:0001:0000:0000:0000:FFFF:1200:1000

0:1::FFFF:1200:1000

Show abbreviation for the following IPv6 address: 0000:FFFF:FFFF:0000:0000:0000:0000:0000

0:FFFF:FFFF::

Decompress the following addresses and show the complete unabbreviated IPv6 address: 1111::

1111:0000:0000:0000:0000:0000:0000:0000

Change the mask 255.240.0.0 to a prefix length and indicate the prefix length in your response.

12

Show abbreviation for the following IPv6 address: 1234:2346:3456:0000:0000:0000:0000:FFFF

1234:2346:3456: :FFFF

The address 14.12.72.8/24 belongs to a block. What will be the first address in the block?

14.12.72.0/24

The address 14.12.72.8/24 belongs to a block. What will be the last address in the block?

14.12.72.255/24

Assume that, in a Stop-and-Wait system, the bandwidth of the line is 640 Kbps, and 1 bit takes 12 milliseconds to make a round trip. If the system data packets are 1,220 bits in length, what is the utilization percentage of the link?

15.9

A port number is _______ bits long.

16

Two hosts A and B, separated by 500 kilometers are connected by a single link of rate 56 Kbps. A needs to send a packet of size 120 bits to B. If the propagation speed along the link is 2.5x10^8 meters/sec, what will be the propagation delay and the transmission delay in milliseconds?

2.0

In classless addressing, what is the value of prefix length (n) if the size of the block N = 1024? (Just write the number and nothing else) ('^' should be read as 'raised to the power of')

22

Change the prefix length n=14 to a mask in dotted-decimal notation and indicate it in your answer.

255.252.0.0

In classless addressing, what is the size of the block (N) if the value of the pre-fix length n = 14 ('^' should be read as 'raised to the power of')

2^18

In classless addressing, what is the size of the block (N) if the value of the pre-fix length n = 0 ('^' should be read as 'raised to the power of')

2^32

In the Go-Back-N protocol, the maximum send window size is ______ and the maximum receive window size is _______, where m is related to the number of bits in the sequence. number.

2m - 1; 1

In classless addressing, what is the value of prefix length (n) if the size of the block N = 1? (Just write the number and nothing else)

32

In a block code, a dataword is 20 bits and the corresponding codeword is 25 bits. How many redundant bits are added to each dataword?

5

Show the unabbreviated colon hex notation for the following IPv6 address: An address with 64 two-bit (01)s. (Please don't use any extra spaces in your result.)

5555:5555:5555:5555:5555:5555:5555:5555

If in a GBN protocol with a sliding window of 7, an ACK = SEQ5 was received, what sequence numbers would be in the sliding window at the sender after the receipt of the ACK?

6,0,1,2,3,4,5

Assume that, in a Stop-and-Wait system, the bandwidth of the line is 640 Kbps, and 1 bit takes 12 milliseconds to make a round trip. What is the bandwidth-delay product?

7680

Show the unabbreviated colon hex notation for the following IPv6 address: An address with 32 four-bit (0111)s. (Please don't use any extra spaces in your result.)

7777:7777:7777:7777:7777:7777:7777:7777

Assume that, in a Stop-and-Wait system, the bandwidth of the line is 640 Kbps, and 1 bit takes 12 milliseconds to make a round trip. If the system data packets are 1,220 bits in length, what is the utilization percentage of the link if we have a protocol that can send up to 5 packets before stopping and worrying about the acknowledgments?

79.43

An IP fragment has arrived with an offset value of 100. What was the number of the last data byte in this fragment?

799

UDP packets have a fixed-size header of _______ bytes.

8

An IP fragment has arrived with an offset value of 100. How many bytes of data were originally sent by the source before the data in this fragment? (Just enter the number and nothing else.)

800

________ provides service to the user to make the process of sending or receiving a message easier.

A UA

A proxy server can act as a/n ______ .

Alias for a host, DNS, and Web server

Find the class of the following classful IP address: 130.34.54.12

Class B

Find the class of the following classful IP addresses: 245.34.2.8

Class E

TCP provides for all but which of the following?

Connectionless communications

In the TCP/IP protocol suite, which of the following is an application layer protocol?

FTP

Statement: Every layer in the protocol layer provides services to another layer.

False

Switches do not broadcast. This statement is ______ .

False

The ___ protocol works on the principle that for better efficiency of transmission multiple packets must be in transition while the sender is waiting for acknowledgment.

Go-Back-N

_________ is a supplementary protocol that allows non-ASCII data to be sent through e-mail.

MIME

Which of the below factors does not affect the speed of a WAN?

NONE OF: Network Traffic, type of cables used, wired vs. wireless

Access control is implemented in the ____ layer.

Network

Could 255.225.0.0 be a mask in CIDR? Respond with a 'Yes' or 'No'.

No

A socket address is a combination of __________.

None of the choices are correct

Which of the below has the lowest geographical limits?

PAN

The formal protocol that defines the MTA client and server in the Internet is called _______.

SMTP

The formal protocol that defines the MTA client and server in the Internet is called ___________.

SMTP

The _________ component in the SSH provides confidentiality, integrity, authentication and compression.

SSH-TRAN

Which of the below is an example of the hybrid computing paradigm?

Skype

HTTP uses the services of _________.

TCP

________ treats the two signs of congestion detections, timeout and three duplicate ACKs, in the same way.

Taho TCP

In the TCP/IP protocol suite, which of the following is an application layer protocol?

The File Transfer Protocol (FTP)

In the TCP/IP protocol suite, which of the following is a network layer protocol?

The Internet Protocol (IP)

A local area network is defined by _____.

The geometric size of the network

Sequencing of data to be transmitted is first handled in the _____ layer.

Transport

Which of the below is not an active network component?

UTP CAT6 cable

In HTTP, _______ server is a computer that keeps copies of responses to recent requests.

a proxy

The transport-layer packet in the TCP/IP protocol suite is called

a segment or a user datagram

Port forwarding is __________.

a service, provided by SSH, that creates a secure channel for applications that do not have security services.

Which of the following addresses are multicast addresses: a. 224.8.70.14 b. 226.17.3.53 c. 240.3.6.25

a. YES, b. YES, c. NO

The congestion window size, after it passes the initial slow start state, follows a saw tooth pattern called _____.

additive increase, multiplicative decrease

In the DNS, the names are defined in ___________ structure.

an inverted-tree

The Internet Protocol (IP) is ________ protocol.

an unreliable

The application layer in the TCP/IP protocol suite is usually considered to be the combination of ________ layers in the OSI model

application, presentation, and session

During an FTP session the data connection may be opened _______.

as many times as needed

In the TCP/IP protocol suite, the physical layer is concerned with the movement of _______ over the physical medium.

bits

The stop and wait protocol uses ______ .

both flow and error control

In TCP's __________ algorithm the size of the congestion window increases additively until congestion is detected.

congestion avoidance

In TCP/IP, a message belonging to the network layer is decapsulated from a packet at the ________ layer.

data link

In the TCP/IP protocol suite, the ______ layer is responsible for moving frames from one hop (node) to the next.

data link

DNS can use the services of ________.

either UDP or TCP

In __________ resolution, the server returns the IP address of the server that it thinks can resolve the query.

iterative

In TCP, the size of the send window is the ________ of rwnd and cwnd.

minimum

In the TCP/IP protocol suite, a logical address is the identifier at the ______.

network layer

In TCP, an ACK segment, if carrying no data, consumes ______ sequence number(s).

no

In a ___________ connection, one TCP connection is made for each request/response.

nonpersistent

In TCP, there can be ______ RTT measurement(s) in progress at any time.

only one

In a ___________ connection, the server leaves the connection open for more requests after sending a response.

persistent

The first section of a URL identifier is the __________.

protocol

The POP is a ___ protocol.

pull-based

SMTP is a __________ protocol.

push

The bytes of data being transferred in each connection are numbered by TCP. The numbering starts with a __________.

randomly generated number

In __________ resolution, the resolver expects the server to supply the final answer.

recursive

A _______ document is a fixed-content document that is created and stored in a server. The client can get a copy of the document only.

static

TELNET is an abbreviation for ____________.

terminal network

The source port number on the UDP user datagram header defines _______.

the process running on the sending computer

In a client-server paradigm

the server must be running all the time but the client needs to be running only when it is needed.

The largest geographic area a WAN can span is

the world

A router is involved in _____layers of the TCP/IP protocol suite.

three

In modern implementations of TCP, a retransmission occurs if the retransmission timer expires or ______ duplicate ACK segments have arrived.

three

In FTP, there are three types of _______: stream, block, and compressed.

transmission modes

In TCP/IP, a message at the application layer is encapsulated in a packet at the ________ layer.

transport

The _____ layer is responsible for the delivery of a message from one process to another.

transport

In the TCP/IP protocol suite, a port number is the identifier at the ____________.

transport layer

In the common scenario, the electronic mail system needs ______.

two UAs, two pairs of MTAs and a pair of MAAs

In the domain name space, what a server is responsible for or has authority over is called a _________.

zone