MIDTERM EXAMINATION
Fall 2008
CS610- Computer Network (Session - 2)
Time: 60 min
Marks: 38
Question No: 1 ( Marks: 1 ) - Please choose one
A
typical port on an ATM switch operates at __________ or higher.
Ø OC-2 speed (155Mbps)
Ø OC-3 speed (100Mbps)
Ø OC-3 speed (155Mbps)
Ø OC-3 speed (155Gbps)
Question No: 2 ( Marks: 1 ) - Please choose one
The
product of delay and throughput measures the _____ of data that can be present on the network.
Ø Area
Ø Volume
Ø Length
Ø None of the given
Question No: 3 ( Marks: 1 ) - Please choose one
__________is used for compressed audio and video where the data rate depends on the level of compression that can be achieved.
Ø Constant Bit Rate (CBR) service
Ø Variable Bit Rate (VBR) service
Ø Available Bit Rate (ABR) service
Ø None of the given
Question No: 4 ( Marks: 1 ) - Please choose one
Which of the following is a connecting device?
Ø Bridge
Ø Repeater
Ø Hub
Ø All the given
Question No: 5 ( Marks: 1 ) - Please choose one
A bridges function in the _________ layers(s).
Ø Physical (MAC)
Ø Data link
Ø Network
Ø Physical (MAC) and Data link
Question No: 6 ( Marks: 1 ) - Please choose one
IEEE LLC/SNAP header is --------, which is used to specify the type of data.
Ø 8 octets
Ø 8 bytes
Ø 8 bits
Ø None of the given
Question No: 7 ( Marks: 1 ) - Please choose one
The
third field of the header consists of ------ bit Ethernet frame type.
Ø 48
Ø 32
Ø 16
Ø 8
Question No: 8 ( Marks: 1 ) - Please choose one
An ------------method, the network hardware designers specify how type information is included in the frame and the value use to identify various frame types
Ø Explicit frame type
Ø Ideal frame type
Ø Implicit frame type
Ø None of the given
Question No: 9 ( Marks: 1 ) - Please choose one
Local Talk is a LAN technology that employs -------------
Ø Star topology
Ø Bus topology
Ø Ring topology
Ø None of the given
Question No: 10 ( Marks: 1 ) - Please choose one
The
Fast Ethernet hardware operates at a rate of --------
Ø 10 Mbps
Ø 100 Mbps
Ø 1000 Mbps
Ø None of the given
Question No: 11 ( Marks: 1 ) - Please choose one
---------- Scheme, which is designed to help detect transmissions errors, send one extra bit of information with each character
Ø Parity
Ø Checksums
Ø CRC
Ø None of given
Question No: 12 ( Marks: 1 ) - Please choose one
Computer networks are often called -------------- because they use packet technology.
Ø Ethernet
Ø Switch networks
Ø Packet networks
Ø None of the given
Question No: 13 ( Marks: 1 ) - Please choose one
------ Program sends a message to a remote computer and reports whether the computer responds.
Ø Ping
Ø Traceroute
Ø ICMP
Ø Non of the given
Question No: 14 ( Marks: 1 ) - Please choose one
In ---------, network occupies larger areas like cities & countries.
Ø LAN
Ø WAN
Ø MAN
Ø None of the given
Question No: 15 ( Marks: 1 ) - Please choose one
In -------------, network occupies the smaller area like a room a floor or a building
Ø LAN
Ø WAN
Ø MAN
Ø None of the given
Question No: 16 ( Marks: 1 ) - Please choose one
In Point-to-Point topology there are two topologies.
Ø Tree and Ring
Ø Star and Ring
Ø Star and Tree
Ø None of the given
Question No: 17 ( Marks: 2 )
Question No: 18 ( Marks: 2 )
Question No: 19 ( Marks: 3 )
Why 10-base T wiring scheme is called star shaped bus wiring scheme.
Question No: 20 ( Marks: 5 )
What are the main factors due to which mechanism of error detections schemes differ?
Question No: 21 ( Marks: 10 )
How much data can be present on an original Ethernet segment at one time? To find out, compute the delay-throughput product. The original Ethernet operate at 10 mega bits per second, and a segment was limited to 500 meters. Assume the signals propagate down the cable at 66 percent of the speed of light.
