Computer network Concepts
Q. No. 1: What do you mean by broadcasting in Networking?
- It means addressing a packet to a particular machine
- It means addressing a packet to except a particular machine
- It means addressing a packet to some machine
- It means addressing a packet to all machine
Q. No. 2: A set of rules that govern all aspects of information communication is called
- OSI Model
Q. No. 3: The cheapest modems can transmit
- 1,200 bits per second
- None of these
- 300 bits per second
- 2,400 bits per second
Q. No. 4: "Parity bits" are used for which of the following purposes?
- To identify the user
- Encryption of data
- To transmit faster
- To detect errors
Q. No. 5: What is the purpose of the PSH flag in the TCP header?
- Typically used to push the message
- Typically used to indicate stop the message
- Typically used to indicate beginning of message
- Typically used to indicate end of message
Q. No. 6: A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
- Delta routing
- Static routing
- Hot potato routing
Q. No. 7: Which of the following is not relevant to networking?
- Low-end stand alone hubs
- Mesh network
- Bus hubs
- Stackable hubs
Q. No. 8: The most common input device used today is
Q. No. 9: The residual error rate is the
- Probability that one or more errors will be undetected when an error detection scheme is used
- Probability that one or more errors will be detected when an error detection mechanism is used
- Number of bit errors per twenty four hours of continuous operation on an asynchronous line
- Signal to noise ratio divided by the ratio of energy per bit to noise per hertz
Q. No. 10: Which of the following functionalities must be implemented by a transport protocol over and above the network protocol?
- End to end connectivity
- Packet delivery in the correct order
- Detection of duplicate packets
- Recovery from packet losses
Q. No. 11: How many digits of the Data Network Identification Code (DNIC) identify the country?
- first six
- first four
- first three
- first five
Q. No. 12: Working of the WAN generally involves
- All of these
- Frame delay
Q. No. 13: How many layers does the SONET contain?
- 2 layers
- 3 layers
- 5 layers
- 4 layers
Q. No. 14: A collection of computers and devices connected together via communication devices and transmission media is called a
Q. No. 15: What is the size of Network bits & Host bits of Class A of IP address?
- Network bits 7, Host bits 23
- Network bits 8, Host bits 23
- Network bits 7, Host bits 24
- Network bits 8, Host bits 24
Q. No. 16: A device which can be connected to a network without using cable is called
- Distributed device
- Wireless device
- Open-source device
- Centralized device
Q. No. 17: A software that allows a personal computer to pretend it, as a terminal is
- Bulletin board
- Terminal emulation
Q. No. 18: Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size?
Q. No. 19: The geostationary satellite used for communications systems
- remains stationery relative to the earth
- all of these
- is positioned over equator
- rotates with the earth
Q. No. 20: Which of the following transmission directions listed is not a legitimate channel?
- Half Duplex
- Full Duplex
- Double Duplex