CS610 Computer Network Solved Quizzes File No 9

________ of TCP/IP layering model, corresponds to basic network hardware.

• · Physical Layer 

• · Network Interface Layer

• · Internet Layer

• · Transport Layer

_______ protocols of TCP/IP layering model specify how to ensure reliable transfer.

• · Physical Layer

• · Network Interface Layer

• · Internet Layer

• · Transport Layer 

 

________is called an end-to-end protocol because it provide a connection directly from an application on one computer to an application on a remote computer.

• · IP

• · UDP 

• · TCP

• · None of the given

____________ uses distance vector approach to define routing

• · BGP

• · OSPF

• · RIP 

• · None of the given

_______ is ideal in a situation where the group is small and all members are attached to contiguous Local Area Networks.

• · Flood-and -Prune 

• · Configuration-and -Tunneling

• · Core-Based Discovery

• · None of the given

Router that decrements TTL to __ sends ICMP time exceeded message, with router s address as source address

• · 3

• · 2

• · 1

• · 0 

 

Protocol addresses are abstractions provided by ___________.

• · hardware

• · software 

• ·

• · internet

Although message exchange can be used to bind addresses, sending a request for each binding is hopelessly inefficient.

• · True 

• · False

ARP is almost always used to bind a ___-bit IP address to a ___-bit Ethernet address.

• · 32, 48 

• · 24, 32

• · 32, 64

• · 32, 128

In the 1970s large organizations began to acquire multiple networks. Each network in the organization formed island. Employees needed to choose a computer appropriate for each task. So they needed multiple screens, keyboards and computers.

• · False

• · True 

In which method of Address Resolution Protocol the protocol address is determined by hardware address? Were "T" stands for Table lookup, "C" for Closed-form Computation and "D" for Data Exchange?

• · T

• · D

• · C 

• · T, C

Which method of Address Resolution Protocol is useful with any hardware?

Were "T" stands for Table lookup, "C" for Closed-form Computation and "D" for Data Exchange?

• · T 

• · C

• · D

• · C, D

In which method of Address Resolution Protocol the implimentation is more difficult?

Were "T" stands for Table lookup, "C" for Closed-form Computation and "D" for Data Exchange?

• · T, C

• · T

• · C

• · D 

Which method of Address Resolution Protocol resolution with minimum delay?

Were "T" stands for Table lookup, "C" for Closed-form Computation and "D" for Data Exchange?

• · T, D

• · c

• · T

• · T, C 

The general form of an IP datagram is with a header followed by data. The header contains information that controls where and how the datagram is to be sent.

• · True 

• · False

To save traffic, an EGP does not summerize routing information from the autonomous system before passing it to another autonomous system.

• · True

• · False 

------------- was especially concerned about the lack of high powered computers.

• · IEEE

• · APRA (wrong spelling)

• · EIA

• · None 

Missing eot indicates sending computer crashed in frame format.

• · True 

• · False

The -------------term refers to the general concept of a small block of data.

• · Packets 

• · Data

• · Frame

• · None of given

CRC can detect more errors than a simple checksum.

• · True 

• · False

The network that uses a -------------, usually consist of a single long cable to which computer attach.

• · Star topology

• · Bus topology 

• · Ring topology

• · None of the given

LAN that use ATM technology have a -------------

• · Star topology

• · Bus topology

• · Ring topology

• · None of the given 

A bridge uses --------------- to determine which computer is connected to which segment, and uses the --------------- to determine whether to forward a copy of frame.

• ·   

• ·

• ·

• ·

--------------- has a jitter zero

• · Virtual Private Network

• · Isochronous Network 

• · Asynchronous Network

• · None of the given

The network with Throughput T and Delay D has a total --------------- bits in transit at a time.

• · D + T

• · D – T

• · D X T 

• · D / T

One repeater ---------------, two repeaters --------------- the maximum cable length limitation.

• · Double, triple 

• · Double, 4 time

• · half, triple

• · Double, half

End-to-end delivery service is connection oriented.

• · True

• · False 

A single networking technology is best for all needs.

• · True

• · False 

Twice NAT allows a site to run servers.

• · True 

• · False

________ device is used for multicasting.

• · Hub

• · Switch

• · Router 

• · none of the given

___________ does not depend on any particular unicast routing protocol.

• · PIM-DM

• · PIM-SM 

• · PIM-AM

• · none of the given

A routing table contains_______

• · The destination network ID

• · The hop count to reach the network

• · The router ID of the next hop 

• · All of the given

_______ can be used to propagate information about remote networks.

• · Dynamic routing 

• · Static routing

• · Address resolution

• · None of the given

________ protocol is designed to use within an organization.

• · OSPF

• · MEOSPF

• · MOSPF 

• · none of the given

NAPT stands for ________________

• · Network Address and Protocol Translation

• · Network Address and Port Translation 

• · Network Address and Packet Translation

• · None of the given

In dynamic routing, the routing table is initialized when system boots.

• · True 

• · False

OSPF includes ________ address mask with each address.

• · 30Bit

• · 32Bit 

• · 34Bit

• · none of the given

Twice NAT fails if an application uses the IP addresses instead of Domain Name.

• · True 

• · False

_________ uses window mechanism to control the flow of data.

• · IP

• · UDP

• · TCP 

• · none of the given

TCP uses _______ mechanism to control the flow of data.

• · door

• · window 

• · acknowledgment

• · retransmission

IGPs stand for _________

• · Internal Gateway Protocols

• · Interior Gateway Protocols 

• · Intermediate Gateway Protocols

• · None of the given

________ protocol uses distance vector algorithm.

• · IGP

• · BGP

• · RIP 

• · none of the given

__________measures distance in network hops, where each network between the source and destination counts as single hop.

• · BGP

• · OSPF

• · RIP 

• · Non of these

Network Address Translation (NAT) requires device to perform packet translation.

• · True 

• · False

We use the term _______ to refer to a measure of the path that routing software use when choosing a route.

• · routing path

• · routing metric 

• · routing

• · switching

Which of the following is a correct representation of the IPv6?

• ·   

• ·

• ·

• ·

Part of the 3-way handshake used to create a connection, requires each end to generate a random _____ sequence number.

• · 32 bit 

• · 16 bit

• · 8 bit

• · 64 bit

Reconstruction of original datagram is called reassembly.

• · True 

• · False

Reliability is the responsibility of the ______ layer.

• · Transport 

• · Network

• · Physical

• · Internet

_______    is ideal in a situation where the group is small and all members are attached to contiguous Local Area Networks.

• · Flood-and -Prune 

• · Configuration-and -Tunneling

• · Core-Based Discovery

• · None of the given

In Direct point to point communication adding the Nth computer requires------------ new connections.

• · None of the given

• · N2

• · N-1 

• · (N2 –N)/2

The number of connections needed for N computer in direct point to point communication is equal to:

• · (N2-N)/2 

• · N(N-1)

• · N2

• · None of the given

Hardware that calculates a CRC uses two simple components.

• · AND unit and XOR unit

• · Shift register and XOR unit 

• · Shift register and AND unit

• · None of the given

The Gigabit Ethernet hardware operates at a rate of --------

• · 10 Mbps

• · 100 Mbps

• · 1000 Mbps 

• · None of the given

________ computes shortest paths in a graph by using weights on edges as a measure of distance.

• · Greedy algorithm

• · Distance vector algorithm

• · Dijksta’s algorithm 

• · Non of the given

Basic LAN technologies such as Ethernet, Token Ring, and FDDI use a _____.

• · Connectionless service paradigm 

• · Connection-oriented service paradigm

• · Both Connectionless and Connection-oriented service paradigm

• · None of the given

An Internet Address (IP address) is a unique __________ binary number assigned to a host and used for all communication with host

• · 48-bit

• · 32-bit 

• · 24-bit

• · None of the given

The address __________ identifies the physical network to which the computer is attached, while the _______ identifies an individual computer on that network.

• · prefix , suffix 

• · suffix , prefix

• · suffix , suffix

• · None of the given

___________ places the boundary between the first and second octets

• · Class A 

• · Class B

• · Class C

• · Class D

___________ places the boundary between the second and third octets.

• · Class A

• · Class B 

• · Class C

• · Class D

___________ places the boundary between the third and fourth octets.

• · Class A

• · Class B

• · Class C 

• · Class D

________ field of header indicates whether a datagram is a fragment or a complete datagram.

• · FLAGS 

• · FLAGMENT OFFSET

• · IDENTIFICATION

• · None of the given

______ provides connectionless service.

• · TCP

• · UDP 

• · IP

• · None of the given

UDP and TCP are both_________ layer protocols

• · Physical

• · Data link

• · Network

• · Transport 

________identifies which application program on receiving computer should receive the data

Logical address

• · Source port

• · Source port 

• · Destination Port 

• · None of the given

________ identifies the application program that sent the data.

• · Destination Port 

• · Source port 

• · Logical address

• · None of the given

The Border Gateway Protocol (BGP) uses_________ for all communication

• · UDP

• · TCP 

• · Both UDP and TCP

• · None of the given

Which of the following protocols allows the sender and receiver to enforce polices.

• · RIP

• · OSPF

• · BGP 

• · RIP and OSPF

ICMP message transport is acted upon by getting ICMP encrypted in IP.

• · True

• · False 

These ICMP message transport is acted upon ________ as frames on ______

• · Intranet, LAN

• · Internet, WAN

• · Intranet, WAN

• · Internet, LAN 

Address mask defines how many bits of address are in suffix?

• · True

• · False 

A computer attached to a given network can only communicate with other computers attached to the same network. Is this a problem with multiple networks?

• · True 

• · False

The term self-identifying is used for Classful IP addresses because the class of the address can be computed from the address__________.

• · itself 

• · prefix

• · suffix

• · mask

Find the class of the address:

11110011 10011011 11111011 00001111

• · A

• · C

• · E 

• · B
• _________ is used to attach two autonomous systems.
  Select correct option:
  
  BGPIGP
  EGP
  none of the given
  
  Question # 2 of 20

  Due to revolutionalization of IP-V6 the speed has increased from _______
  Select correct option:
  
  56kbps to 512kbps
  512kbps to 1gbps
  56kbps to 1gbps
  none of the given

   Scale is also dramatically changed. Size from a few tens to a few tens of millions

  of computers has been revolutionized. Speed has increased from 56Kbps to 1Gbps. Also

  there is an increased frame size in hardware

  Question # 3 of 20

  Whenever it handles a packet, IP software needs to separate the destination address into a prefix.
  Select correct option:
  True
  FalseCOMPUTING THE CLASS OF AN ADDRESS:

  Whenever it handles a packet, IP software needs to separate the destination

  address into a prefix and suffix.
  
  Question # 4 of 20
  TTL stands for __________
  Select correct option:
  
  Time to Learn
  Time to Leave
  Time to Livenone of the given
  
  
  Question # 5 of 20
  IGPs stand for _________
  Select correct option:
  
  Internal Gateway Protocols
  Interior Gateway ProtocolsIntermediate Gateway Protocols
  None of the given
  Question # 6 of 20
  _____________identifies which application program on receiving computer should receive the data
  Select correct option:
  
  Logical address
  Source port
  Destination PortNone of the given
  Field Destination Port identifies which application program on receiving computer should receive the data. While field source port identifies the application programs that sent the data.
  Question # 7 of 20
  __________________encapsulates IP datagram as data area in hardware frame.
  Select correct option:
  
  Network Interface LayerDatalink Layer
  Network Layer
  None of the givenThe network interface layer encapsulates an entire datagram in the data area of a hardware frame
  
  
  Question # 8 of 20
  
  
  Class A mask is 255.0.0.0 which is used for ________________
  Select correct option:
  Unicasting
  Multicasting
  SubnettingAll of the given
  class A mask is 255.0.0.0 which is used for subnetting.
   
  Question # 9 of 20
  
  
  NAT is not useful at a residence with Cable Modem or DSL connectivity.
  Select correct option:
  True
  False
   
  Question # 10 of 20
  Autonomous System chooses a routing protocol to exchange routing information which is passed before being summarized to another group.
  Select correct option:
  TrueFalse
  
  Question # 11 of 20
  ______ layer Provides reliable delivery of datagram.
  Select correct option:
  Network
  TransportDatalink
  none of the given
  
  Transport layer provides reliable delivery. Network layer – IP – can detect and
  report errors without actually fixing them. It focuses on datagram delivery. Application
  layer is not interested in differentiating among delivery problems at intermediate routers
  Question # 12 of 20
  The process of using a routing table to select a next hop for a given datagram is called_________.
  Select correct option:
  Encapsulation
  Reassembling
  Routing or forwardingNone of the givenThe process of using a routing table to select a next hop for a given datagram is called routing or forwarding.
  Question # 13 of 20
  The process of learning the path MTU is known as path MTU discovery.
  Select correct option:
  True
  False
  The process of learning the path MTU is known as path MTU discovery.
   
  Question # 14 of 20
  As the Internet grew, the original Classful addressing scheme became a limitation. The IP address space was being exhausted because all networks had to choose one of ________ possible sizes.
  Select correct option:
  three
  two
  four
  five
  
  
  Three
   As the Internet grew, the original Classful addressing scheme became a limitation.
  The IP address space was being exhausted because all networks had to choose one of
  three possible sizes. Many addresses were unused.
  Two new mechanisms were invented to overcome the limitations, which are as
  follows:
  • Subnet addressing
  • Classless addressing
  Question # 15 of 20
  End to End delivery Service of IP datagram is _____
  Select correct option:
  
  Connection oriented
  Connectionless
  both a and b
  none of the given
  
  
  Question # 16 of 20
  EGP stands for _________
  Select correct option:
  
  Extension Gateway Protocol
  Exterior Gateway ProtocolExplicit Gateway Protocol
  none of the given
  
  
  Question # 17 of 20
  Hashing is the transformation of a string of characters into a usually shorter fixed-length value or a key that represents the original string.
  Select correct option:
  
  TrueFalse
  Hashing is the transformation of a string of characters into a usually shorter fixed-length value or a key that represents the original string. Hashing is used to index and retrieve items in a database because it is faster to find the item using the shorter hashed key than to find it using the original value. It is also used in many encryption algorithms.
  Question # 18 of 20
  Although the ARP message format is sufficiently general to allow arbitrary protocol and hardware addresses. ARP is almost always used to bind a 32-bit IP address to a ____ Ethernet address.
  Select correct option:
  
  16-bit
  48-bit64-bit
  128-bit
   Although the ARP message format is sufficiently general to allow arbitrary protocol and hardware addresses. ARP is almost always used to bind a 32-bit IP address to a 48-bit Ethernet address
  Question # 19 of 20
  Reliability is not the responsibility of the Transport layer.
  Select correct option:
  
  True
  False
   Reliability is the responsibility of the Transport layer. In TCP/IP, TCP provides reliable transport service. Most Internet applications use TCP as no other protocol has proved to work better.
   
  Question # 20 of 20
  
  
  IPV6 address with ______ leading zeros is interpreted to hold an IPV4 address.
  Select correct option:
  
  96100
  120
  none of the given
  IPv6 address with 96 leading zeros is interpreted to hold an IPv4 addressQuestion # 1 of 20 
  
  
  NAT software does not allow a PC to connect with the Internet and act as a NAT device at the same time.
  Select correct option:
  True
  False
  
  
  Question # 2 of 20
  TCP uses the term segment to refer to a ________.
  Select correct option:
  
  packet
  messageboth (a) and (b)
  None of the given
  both a and b?
   TCP uses single format for all messages. TCP uses the term segment to refer to a message. Each message sent from TCP on one machine to TCP on another machine uses this format including data and acknowledgement.
  Question # 3 of 20
  The Universal Datagram Protocol is a message-oriented protocol.
  Select correct option:
  
  TrueFalse
   UDP has the following characteristics.
  • It is an end-to-end protocol. It provides application-to-application communication.
  • It provides connectionless service.
  • It is a Message-Oriented protocol.
  • It uses best-effort delivery service.
  • It follows arbitrary interaction.
  • It is operating system independent
  Question # 4 of 20
  ______________field tells the receiver how to order fragments within a given datagram.
  Select correct option:
  FLAGS
  FLAGMENT OFFSET
  IDENTIFICATION
  None of the given
  The FRAGMENT OFFSET field tells a receiver how to order fragments within a given datagram
  Question # 5 of 20
  IP datagram can contains ________ octets.
  Select correct option:
  
  0-65,535
  1-65,5351-65,536
  none of the given
  Datagrams can have different sizes i.e.
   Header area is usually fixed (20 octets) but can have options. Data area can contain
  between 1 octet and 65.535 octets (216-1).
  Usually, data area is much larger than header.
  
  
  Question # 6 of 20
  The amount of buffer space available at any time is called the window.
  Select correct option:
  TrueFalse 
  Question # 7 of 20
  _______ Source is responsible for fragmentation.
  Select correct option:
  
  IPV4
  IPV6
   IPv6 source (not intermediate routers) is responsible for fragmentation. Routers
  simply drop datagrams larger than network MTU (Maximum Transmission Unit). So
  source must fragment datagram to reach destination.
  Question # 8 of 20
  Routers use _______ to forward datagrams along prearranged path.
  Select correct option:
  
  Traffic class
  Flow labelDestination address
  none of the given
   Routers use flow label to forward datagrams along prearranged path
  Question # 9 of 20
  _______ protocol uses three way handshake to begin a connection.
  Select correct option:
  
  UDP
  TCPIP
  none of the given
  Question # 10 of 20
  Typical internet routing uses uses a combination of two metrics__________________.
  Select correct option:
  
  routing metrics
  administrative cost and routing metrics
  hop cost
  administrative cost and hop count 
  Question # 14 of 20
  Network Address and Port Translation (NAPT) is by far the most popular form of _______
  Select correct option:
  
  Network Address Transmission
  Network Address TranslationNetwork Address Transformation
  None of the given 
  Question # 15 of 20
  The routers within an autonomous system use a _____________ to exchange routing information.
  Select correct option:
  
  Interior Gateway protocols(IGPs)Exterior Gateway protocol (EGPs)
  Both Interior Gateway protocols(IGPs) and Exterior Gateway protocol (EGPs)
  None of the given
  
  
  It is used among routers within autonomous system. The destinations lie within IGP.  
  Question # 17 of 20
  Interior Gateway Protocols (IGPs) and Exterior Gateway Protocols (EGPs) two broad classes of Internet Routing Protocol.
  Select correct option:
  
  TrueFalse 
  Question # 18 of 20
  The Network Layer Protocol ICMP stands for____________
  Select correct option:
  
  Instant Control Message Protocol
  Internet Control Message ProtocolInitial Control Message Protocol
  None of the given 
  Question # 19 of 20
  The Current version of IP-Version 4 is _____ old
  Select correct option:
  
  18 years
  20 years22 years
  none of given
  Question # 20 of 20 ( Start time: 11:05:43 AM ) Total M - 1
  TCP is a connectionless and reliable transport protocol.
  Select correct option:
  
  True
  False