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- Question
Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?
Options- A. 1 slots
- B. 5 slots
- C. 10 slots
- D. 14 slots
- Correct Answer
- 5 slots
- 1. Which of the following connectivity devices is used to extend a network on a purely mechanical basis?
Options- A. Gateway
- B. Switch
- C. Router
- D. Active hub Discuss
- 2. The IEEE 802 project of the 1980s involved further defining the lower two layers of the OSI model. A number of standards were agreed upon during that time. Which of the following is the standard for Ethernet?
Options- A. 802.2
- B. 802.3
- C. 802.4
- D. 802.5
- E. 802.6 Discuss
- 3. The frequency range : 300 kHz to 3 MHz is used for
Options- A. AM radio transmission
- B. FM radio transmission
- C. TV transmission
- D. microwave communications, satellite and radar
- E. None of the above Discuss
- 4. Which utility is an all-purpose tool for troubleshooting TCP/IP problems?
Options- A. NBTSTAT
- B. Netstat
- C. PING
- D. Hostname
- E. None of the above Discuss
- 5. Which of the following statements is correct?
Options- A. characteristic of the hub architecture of ARC-net is alternative routing.
- B. characteristic of LAN is unlimited expansion
- C. characteristic of LAN is low cost access for low bandwidth channels
- D. characteristic of the hub architecture of ARC-net is directionalized transmission
- E. None of the above Discuss
- 6. A modem is connected in between a telephone line and a
Options- A. network
- B. computer
- C. communication adapter
- D. serial port
- E. None of the above Discuss
- 7. What function does a serial interface perform in data communication?
Options- A. Converts serial data into audio signals
- B. Converts analog signals into digital signals
- C. Converts parallel data into a stream of bits
- D. Decodes incoming signals into computer data
- E. None of the above Discuss
- 8. Which of the following statement is correct?
Options- A. Satellite transponders use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations.
- B. Satellite transponders contain a device that echos the radiation without change from one point on earth to another
- C. Satellite transponder contain devices that transform the message sent from one location on earth to a different code for transmission to another location
- D. satellite transponders us lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations
- E. None of the above Discuss
- 9. Modulation in which the two binary values are represented by two different amplitudes of the carrier frequency is known as
Options- A. Amplitude-shift keying
- B. Amplitude
- C. Amplitude modulation
- D. Aloha
- E. None of the above Discuss
- 10. You have been contracted to install a windows NT network in an office that is located in a strip mall. The office is located next to the power plant of the building, so a UPS (uninterruptible power supply) has already been installed. What type of cable should you use for the network cabling? Choose the best answer.
Options- A. TI
- B. UTP
- C. Fiber-optic
- D. PSTN
- E. STP Discuss
Networking problems
Search Results
Correct Answer: Active hub
Correct Answer: 802.3
Correct Answer: AM radio transmission
Correct Answer: PING
Correct Answer: characteristic of the hub architecture of ARC-net is directionalized transmission
Correct Answer: communication adapter
Correct Answer: Converts parallel data into a stream of bits
Correct Answer: Satellite transponders use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations.
Correct Answer: Amplitude-shift keying
Correct Answer: STP
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