Deptt. Of Computer Systems and Software Engg.

MID TERM TEST

CCNW
2K CS Batch

Date: January 30, 2003                                                             Marks: 05

 

 

 

1.      What is the function of a MAC address?

A. to provide NICs with connectivity

B. to identify all devices at the Network layer

C. to identify each device or interface at the Data Link layer

D. to be used in a multicast addressing system

E. none of the above

2.      On an Ethernet segment, when one station is transmitting, all the other stations on the segment will listen before transmitting and do which of the following?

A. Transmit when they are ready

B. Defer and try later

C. Go to pending mode

D. Go to standby mode

E. None of the above

3.      Which of the following do you think you can connect over an internetwork?

A. LAN            B. WAN          C. Computer Systems                      D. Software

4.      What type of address would be burned-in to the Network Interface Card of a personal computer?

A. Frame address

B. Packet address

C. Network layer address

D. MAC address

E. None of the above

5.      Which of the following do you think a repeater does?

a.      It converts data from one protocol to another.

b.      It regenerates and propagates the data.

c.      It analyzes the address of the packet and sends the packet to destination.

6.      A bridge forwards the data packets based on ___________ addresses.

7.      Bridges can be used to filter traffic.                       T/F

8.      Ethernet switches offer __________________  dedicated bandwidth to LAN segments.

9.      What access method is used on Ethernet networks?

A. CSMA/CD

B. CSMD/CD

C. CDMC/CD

 

10. The lower two OSI model layers are implemented with 

a.      Hardware      b.    Software             c.  Hardware and Software

7.   All network devices implement all seven layers of OSI model.    T/F

  1.  Assume that System A has information to send to System B. Which of System A’s seven layers do u think the application program communicate with
    1. 3                      b.   6                c.  7                 d. 1 & 2
  2. There are Two Systems A and B. the primary concern of  layer 6 in System A is to communicate with
    1. Layer 7 in System A
    2. Layer 5 in System A             c.  Layer 6 in System B
  3. Each layer’s protocol exchange information, called protocol data units (PDU), b/w _____________________  layers.
    1. Adjacent                     b.  Peer
  4. Segmenting a network with an Ethernet switch will give you which of the following benefits?

A. Enables multiple simultaneous data exchanges

B. Lower latency than routers

C. Increases the available bandwidth of a network

D. Works with existing 802.3 compliant NICs and cabling

E. All of the above

  1. The ______________ layer is said to be the service user while the ____________ layer is service provider.
  2. Sessions are Logical connections b/w network devices.             T/F
  3. Do u think that the presentation layer is concerned with the data structure used by program?                                               T/F
  4. The presentation layer is responsible for data encryption.                       T/F
  5. Do u think that the application layer provides services to any other OSI layer.  T/F
  6. Which of the following is true for bus topology.
    1. Each device is directly linked to all other devices.
    2. Devices are linked in circular fashion, each device being linked two other devices.
    3. Devices r directly connected to a central backbone.
  7. The 10Base5 wiring standard is known as _____________________ Ethernet.

     19. When packets are destined for a single network host, this is called a ________?

A. unicast

B. broadcast

C. anycast

D. monocast

E. multicast

 

  1. The 10BaseT wiring standard carries Ethernet frames on ___________________ .
  2. What do think a transmitting device does if it recognizes a collision?
    1. It ceases all transmission.
    2. It sends out jamming signal.
    3. It continue to transmit.
  3. Logically a token ring network is a ____________ but it is physically laid out as a __________________.
  4. What do think a token ring network can have more than eight stations?            T/F
  5. What do think a token ring network use MAC addresses.                       Yes/No
  6. Token ring networks r very porn to collisions.                                T/F
  7. IP datagrams r guaranteed to arrive at their destination in the sequence in which they were sent.   
  8. Every time a route passes through _______________ is deemed to be a hop.
    1. A network.            b. A network Link                        c.  A internetwork node.
  9. Node address exist at __________________ layer of OSI model.
  10. The ARP maps ________________ addresses to _________________ addresses.

     30. What is the major difference between Ethernet and Fast Ethernet?

A. Fast Ethernet runs at 1Gbps.

B. Fast Ethernet runs at 100 Mbps.

C. Fast Ethernet is always full-duplex.

D. Fast Ethernet doesn't use CSMA/CD.

  1. The RARP maps _______________ addresses to _________________ addresses.
  2. How UDP packet travels to its destination.
    1. Encapsulated in IP packet.              b. In TCP packet

       33. Choose the two answers that represent the length of a MAC address.

A. 32 bit hexadecimal address  B. 48 bit hexadecimal address

C. 48 bit binary address            D. 6 byte binary address

E. 6 byte hexadecimal address

      34.  What OSI layer does a MAC address reside in?

A. Physical layer      B. Presentation layer

C. Transport layer    D. Network layer

E. None of the above

       35. What is the maximum cable length for 100BaseTX using Category 5 copper cable?

A. 100 meters        B. 200 meters            C. 1000 meters

D. 2000 meters

 

 

        36. Which of the following are true about using bridges to segment LANs? (Choose two answers.)

A. Segmentation allows more users on a segment.

B. Bridges forward all frames with a valid CRC.

C. Bridges are protocol-independent and plug and play.

D. Bridges are being replaced in the marketplace by switches

       37. What does the acronym MAC address stand for?

A. Media Addressing Control          B. Media Access Control

C. Multi-Access Control                  D. Media Access Capability

E. Multi-Address Control

    38. What is the addressing used primarily on an Ethernet or Token Ring LAN?

A. IP addressing      B. Frame addressing       C. MAC addressing

D. Connectivity         E. None of the above

     39. What are some of the disadvantages of bridging vs. routing?

A. Bridges cannot provide flow control

B. Bridges cannot provide congestion feedback information to end node

C. Bridges have more latency than routers

D. All of the above

E. None of the above

     40. What is it called when packets are destined for a specific set of network devices?

A. unicast     B. broadcast         C. flexicast            D. monocast

E. multicast

      41. In a  Full-duplex operation there are no collisions.                             T/ F

42. BNC stands for ________________________________________.

43. Give the sequence of EIA/TIA 568 B straight through cable?

44. How  many ohm resistor is used for termination in bus topology.

45. In bus topology if one computer is off whole network will be down.    T/ F

46. In star topology if one wire is broken whole network will be down.     T/ F

47. In bus topology all computer r connected to backbone.                      T/ F

48. On internet routing of data is done by OSI protocol.                           T/ F

49. In OSI adjacent layer are logically connected.                                          T/ F     

50. Less wire is used in star topology as compared to bus topology .       T/ F

 

 

 

Subject Teacher: Shaikh, Faisal Karim

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