CS610 - Midterm 2008 Solved Paper -Computer Network -
Fall 2008
A typical port on an ATM switch operates at __________ or higher.
► OC-2 speed (155Mbps)
► OC-3 speed (100Mbps)
► OC-3 speed (155Mbps)
► OC-3 speed (155Gbps)
A typical
port on an ATM switch operates at OC-3 speed (155 Mbps) or higher, with
the largest and most expensive switches handling much higher capacities
The product of delay and throughput measures the _____ of data that can be present on the network.
► Area
► Volume
► Length
► None of the given
To
summarize: The product of delay and throughput measures the volume of
data that can be present on the network. A network with throughput T and
delay D can have a total ofT×D bits in transit at any time
__________is used for compressed audio and video where the data rate depends on the level of compression that can be achieved.
Constant Bit Rate (CBR) service
Variable Bit Rate (VBR) service
Available Bit Rate (ABR) service
None of the given
VARIABLE BIT RATE (VBR):
It is used for compressed audio and video where the data rate depends on the level
of compression that can be achieved.
Which of the following is a connecting device?
Bridge
Repeater
Hub
All the given
A bridges function in the _________ layers(s).
Physical (MAC)
Data link
Network
►Physical (MAC) and Data link
IEEE LLC/SNAP header is --------, which is used to specify the type of data.
8 octets
8 bytes
8 bits
None of the given
X
Packet Type (PT), the five values of which were listed previously, in
Table 7-2. The IEEE 802. lX Packet Body Length (PBL) follows the Packet
Type. Because the LLC/SNAP header is eight octets long, and the IEEE 802
The third field of the header consists of ------ bit Ethernet frame type.
48
32
16
8
An
------------method, the network hardware designers specify how type
information is included in the frame and the value use to identify
various frame types.
Explicit frame type
Ideal frame type
Implicit frame type
None of the given
EXPLICIT FRAME TYPE:
In this type the identifying value is included with frame describes types of included data.
Local Talk is a LAN technology that employs _____________
Star topology
Bus topology
Ring topology
None of the given
Almost altogether network technologies use different wiring schemes. e.g., local talk uses hubs
(physical star) to simulate a bus topology.
The Fast Ethernet hardware operates at a rate of _______________
10 Mbps100 Mbps
10 Mbps100 Mbps
1000 Mbps
None of the given
The Ethernet speed was originally 3Mbps, and the current standard is 10Mbps
the fast Ethernet operates at 100Mbps. There are also gigabits Ethernet available now
___________scheme, which is designed to help detect transmissions errors, send one extra bit of information with each character
Parity
Checksums
CRC
None of given www.vuzs.net
Computer networks are often called -------------- because they use packet technology.
Ethernet
Switch networks
Packet networks
None of the given
Computer networks are often called packet networks or packet switching networks because they use packet technology
_____________Program sends a message to a remote computer and reports whether the computer responds.
Ping
Trace route
ICMP
Non of the given
The
ping program sends a message to a remote computer and reports whether
the computer responds; the traceroute program identifies intermediate
computers along a path to a remote destination. Ping and traceroute software is included in
In ______________ network occupies larger areas like cities & countries.
LAN
WAN
MAN
None of the given
In -------------, network occupies the smaller area like a room a floor or a building.
LAN
WAN
MAN
None of the given
In Point-to-Point topology there are two topologies.
Tree and Ring
Star and Ring
Star and Tree
None of the given
POINT-TO-POINT:
In Point-to-Point topology there are two topologies.
1) STAR topology
2) TREE topology
Question No: 17 ( M a r k s: 2 )
Question No: 18 ( M a r k s: 2 )
Question No: 19 ( M a r k s: 3 )
Why 10-base T wiring scheme is called star shaped bus wiring scheme.
Question No: 20 ( M a r k s: 5 )
What are the main factors due to which mechanism of error detections schemes differ?
Question No: 21 ( M a r k s: 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.
