370 Midterm

Method(s) to move data through a network of links and switches

d) Both packet switching and Circuit switching

In the layer hierarchy as the data packet moves from the upper to the lower layers, headers are

a) added

User datagram protocol is called connectionless because

a) all UDP packets are treated independently by transport layer

Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?

c) Telnet

Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?

c) Telnet

Which one is not true regarding the pipelined protocols in transport layer?

c) in Go-Back-N receiver individually acknowledges all correctly received packets

Which one is not true regarding the UDP checksum?

c) receiver puts checksum value into UDP checksum field

Which of the following is true regarding the protocols? a) They define the format and the order of messages sent among network entities. b) They define the format and the order of messages received among network entities c) They define the actions taken on message transmission d) A & B & C

d) A & B & C

The first Network

d) ARPANET

15. Which one of the following is not correct? a) application layer protocols are used by both source and destination devices during a communication session 3 b) HTTP is a session layer protocol c) TCP is an application layer protocol d) All of the mentioned

d) All of the mentioned

24. Which of the following is an application layer service ? a) Network virtual terminal b) File transfer, access, and management c) Mail service d) All of the mentioned

d) All of the mentioned

Transmission control protocol is

d) All of the mentioned

Transport services available to applications in one or another form

d) All of the mentioned

19. This is one of the architecture paradigm

d) Both Peer to Peer & Client Server

As the resources are reserved between two communicating end systems in circuit switching, this is achieved

guaranteed constant rate

The _______ is the physical path over which a message travels

B) medium

Frequency division multiplexing is a process in ... a) access network b) cable network c) DSL d) a & b & c

A & b & c

A local telephone network is an example of a _______ network

A) Packet switched

Which of this is not a network edge device?

D) Switch

Which one of the following is not true regarding the 'Internet'?

It is in network layer

Which one of the following is not true regarding the internet

It is in network layer

All communication activities in the internet is governed by..

Protocols

Which one of the following is a version of UDP with congestion control?

a) Datagram congestion control protocol

21. Application layer offers _______ service

a) End to end

16. When displaying a web page, the application layer uses the

a) HTTP protocol

A set of rules that governs data communication

a) Protocols

The IETF standards documents are called

a) RFC

Electronic mail uses this Application layer protocol

a) SMTP

11. The ASCII encoding of binary data is called

a) base 64 encoding

The ____________ translates internet domain and host names to IP address.

a) domain name system

Transport layer aggregates data from different applications into a single stream before passing it to

a) network layer

In _________ resources are allocated on demand.

a) packet switching

A _____ is a TCP name for a transport service access point.

a) port

14. Which protocol is a signalling communication protocol used for controlling multimedia communication sessions?

a) session initiation protocol

Which one of the following protocol delivers/stores mail to reciever server?

a) simple mail transfer protocol

An endpoint of an inter-process communication flow across a computer network is called

a) socket

Which one of the following is a transport layer protocol?

a) stream control transmission protocol

The structure or format of data is called

a) syntax

20. Application developer has permission to decide the following on transport layer side

b) Both transport layer protocol and maximum buffer size

The resources needed for communication between end systems are reserved for the duration of session between end systems in ________

b) Circuit switching

18. The packet of information at the application layer is called

b) Message

As the resouces are reserved between two communicating end systems in circuit switching, this is achieved

b) Packet switching

Most packet switches use this principle

b) Store and forward

Which one is true about TCP premature timeout?

b) it happens when timeout value is too short

Transport layer protocols deals with

b) process to process communication

12. Which one of the following is an internet standard protocol for managing devices on IP network?

b) simple newtwork management protocol

12. Which one of the following is an internet standard protocol for managing devices on IP network?

b) simple newtwork management protocol

Socket-style API for windows is called

b) winsock

Which one of the following is a transport layer protocol used in networking?

c) Both TCP and UDP

22. E-mail is

c) Elastic application

To deliver a message to the correct application program running on a host, the _______ address must be consulted

c) Port

23. Pick the odd one out

d) Internet telephony

26. This is a time-sensitive service

d) Internet telephony

17. This is not a application layer protocol

d) TCP

What is 'cwnd'? a) Congestion window size b) dynamic function of perceived network congestion c) It includes only in-flight segments d) a & b

d) a & b

What are the main components of a home network? a) wireless access point b) router. Firewall, NAT c) wired Ethernet, cable or DSL modem d) a & b & c & d

d) a & b & c & d

9. Application layer protocol defines a) types of messages exchanged b) message format, syntax and semantics c) rules for when and how processes send and respond to messages d) all of the mentioned

d) all of the mentioned

Which of the following is an application layer service? a) Network virtual terminal b) File transfer, access, and management c) Mail service d) All of the mentioned

d) all of the mentioned

Which of the following is an effective strategy for TCP flow control? a) additive increase and multiplicative decrease b) receiver advertises free buffer space by including rwnd value in TCP header of receiver-tosender segments c) sender limits amount of unacked ("in-flight") data to receiver's rwnd value

d) b & c

Which of the following is not true regarding the TCP congestion control?

d) in TCP TENO loss is indicated by 2 duplicate ACKs

Communication between a computer and a keyboard involves ______________ transmission

d) simplex

13. Which one of the following is not an application layer protocol?

resource reservation protocol