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MCQs Computer Networks|UGC-NET|GATE|Computer Science

1.A file is downloaded in a home computer using a 56 kbps MODEM connected to an Internet Service Provider. If the download of file completes in 2 minutes, what is the maximum size of data downloaded ?
A.112 Mbits
B.6.72 Mbits
C.67.20 Mbits
D.672 Mbits
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Explanation
2.In ______ CSMA protocol, after the station finds the line idle, it sends or refrains from sending based on the outcome of a random number generator.
A.Non-persistent
B.0-persistent
C.1-persistent
D.p-persistent
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3.Which of the following substitution technique have the relationship between a character in the plaintext and a character in the ciphertext as one-to-many ?
A.Monoalphabetic
B.Polyalphabetic
C.Transpositional
D.None
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4.What is the maximum length of CAT-5 UTP cable in Fast Ethernet network ?
A.100 meters
B.200 meters
C.1000 meters
D.2000 meters
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5.The count-to-infinity problem is associated with
A.Flooding algorithm
B.Hierarchical routing algorithm
C.Distance vector routing Algorithm
D.Link state routing algorithm
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6.The IEEE single-precision and double-precision format to represent floating-point numbers, has a length of ______ and ______ respectively
A.8 bits and 16 bits
B.16 bits and 32 bits
C.32 bits and 64 bits
D.64 bits and 128 bits
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7.A method to provide secure transmission of email is called ____.
A.TLS
B.SA
C.IPSec
D.PGP
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8.Suppose a file of 10,000 characters is to be sent over a line at 2400 bps. Assume that the data is sent in frames. Each frame consists of 1000 characters and an overhead of 48 bits per frame. Using synchronous transmission, the total overhead time is ______.
A.0.05 second
B.0.1 second
C.0.2 second
D.2.0 second
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9.Which of the following is the size of Network bits and Host bits of Class A of IP address ?
A.Network bits 7, Host bits 24
B.Network bits 14, Host bits 16
C.Network bits 15, Host bits 16
D.Network bits 16, Host bits 16
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10.Which of the following field of the TCP header tells how many bytes may be sent starting at the byte acknowledged ?
A.TCP header length
B.Window size
C.Acknowledgement number
D.Urgent pointer
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Author Does Not claim of any answer these answers are as per expert opinion


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