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- Question
Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost.
Options- A. P I (K + 1)
- B. KIK (1 + F)
- C. 1/ (1 - F)
- D. K I (K - P)
- E. None of the above
- Correct Answer
- 1/ (1 - F)
- 1. When using the loopback address, if TCP/IP is installed correctly, when should you receive a response?
Options- A. Immediately
- B. Only if the address fails
- C. After the next host comes online
- D. Within two minutes
- E. None of the above Discuss
- 2. Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size?
Options- A. 4
- B. 8
- C. 15
- D. 16
- E. None of the above Discuss
- 3. Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages selectively?
Options- A. SMTP
- B. DHCP
- C. IMAP
- D. POP3 Discuss
- 4. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 12 hosts and a maximum number of subnets?
Options- A. 255.255.255.192
- B. 255.255.255.224
- C. 255.255.255. 240
- D. 255.255.255.248
- E. 255.255.255.252 Discuss
- 5. Which of the following statement is correct?
Options- A. Satellite transponders contain a receiver and transmitter designed to relay microwave transmissions from one point on earth to another.
- B. Satellite transponders contain a device that echos the radiation without change from one point on earth to another.
- C. Satellite transponder contains devices that transform the message sent from one location on earth to a different code for transmission to another location.
- D. Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations
- E. None of the above Discuss
- 6. Which IP address class has few hosts per network?
Options- A. D
- B. C
- C. B
- D. A
- E. None of the above Discuss
- 7. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?
Options- A. Recognised standard
- B. Random sequence
- C. Recommended standard
- D. Registered source
- E. None of the above Discuss
- 8. In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and
Options- A. PC
- B. synchronous port
- C. crossover cable
- D. asynchronous port
- E. None of the above Discuss
- 9. What protocol is used between E-Mail servers?
Options- A. FTP
- B. SMTP
- C. SNMP
- D. POP3 Discuss
- 10. A hard copy would be prepared on a
Options- A. typewriter terminal
- B. line printer
- C. plotter
- D. All of the above
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: Immediately
Correct Answer: 15
Correct Answer: POP3
Correct Answer: 255.255.255. 240
Correct Answer: Satellite transponders contain a receiver and transmitter designed to relay microwave transmissions from one point on earth to another.
Correct Answer: C
Correct Answer: Recommended standard
Correct Answer: asynchronous port
Correct Answer: SMTP
Correct Answer: All of the above
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