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- Question
Error detection at a data link level is achieved by
Options- A. bit stuffing
- B. cyclic redundancy codes
- C. Hamming codes
- D. equalization
- E. None of the above
- Correct Answer
- cyclic redundancy codes
- 1. The network layer, in reference to the OSI model, provide
Options- A. data link procedures that provide for the exchange of data via frames that can be sent and received
- B. the interface between the X.25 network and packet mode device
- C. the virtual circuit interface to packet-switched service
- D. All of the above
- E. None of the above Discuss
- 2. What is the name of the computer based EMMS that provides a common forum where users can check in at their convenience, post messages, actively exchange ideas and participate in ongoing discussions?
Options- A. E-mail
- B. Bulletin board system (BBS)
- C. Teleconferencing
- D. Videoconferencing
- E. None of the above Discuss
- 3. What is the minimum number of wires needed to send data over a serial communication link layer?
Options- A. 1
- B. 2
- C. 4
- D. 6
- E. none of the above Discuss
- 4. Which of the following statement is incorrect?
Options- A. The CCITT Recommendation X.25 specifies three layers of communication: physical, link and network.
- B. The second layer of communication is the data-link layer
- C. Errors in the physical layer can be detected by the data link layer
- D. The fourth layer, in reference to the OSI model, is the session layer
- E. None of the above Discuss
- 5. What is the first octet range for a class B IP address?
Options- A. 128 - 255
- B. 1 - 127
- C. 192 - 223
- D. 128 - 191
- E. 127 - 191 Discuss
- 6. Which of the following statement is incorrect?
Options- A. Gateways are assumed to know correct routes; hosts begin with minimal routing information and learn new routes from gateways.
- B. Layered protocols are designed so that layer n at the destination receives exactly the same object sent by layer n at the source.
- C. Application programs as well as all protocol software from the Internet layer upward use only IP addresses; the network interface layer handles physical addresses.
- D. All of the above
- E. None of the above Discuss
- 7. Devices on one network can communicate with devices on another network via a
Options- A. file server
- B. utility server
- C. printer server
- D. gateway
- E. None of the above Discuss
- 8. Packet Switch Stream (PSS) was introduced in
Options- A. the US in 1961 (&) the UK in 1981
- B. the UK in 1980
- C. the US in 1961
- D. None of the above Discuss
- 9. Error detection at the data link level is achieved by?
Options- A. Bit stuffing
- B. Hamming codes
- C. Cyclic Redundancy codes
- D. Equalization
- E. None of the above Discuss
- 10. You are working with a class C network. You are required to configure it for five subnets, each of which will support 25 nodes. What subnet should you use?
Options- A. 255.255.255.0
- B. 255.255.255.224
- C. 255.255.255.240
- D. 255.255.255.248
- E. 255.255.255.252 Discuss
Networking problems
Search Results
Correct Answer: the virtual circuit interface to packet-switched service
Correct Answer: Bulletin board system (BBS)
Correct Answer: 2
Correct Answer: The fourth layer, in reference to the OSI model, is the session layer
Correct Answer: 128 - 191
Correct Answer: All of the above
Correct Answer: gateway
Correct Answer: the UK in 1980
Correct Answer: Cyclic Redundancy codes
Correct Answer: 255.255.255.224
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