LAN Switching and Wireless

481. IS-95 uses the ISM __________band.

  1. 800-MHz
  2. 900-MHz
  3. 1900-MHz
  4. either (a) or (c)

Correct answer: (D)
either (a) or (c)

482. Layer 2 lies between the physical layer and the _________ layer.

  1. Network
  2. Data link
  3. Transport
  4. None of the above

Correct answer: (A)
Network

483. LEO satellites are normally below an altitude of __________ km.

  1. 1000
  2. 2000
  3. 3000
  4. none of the above

Correct answer: (B)
2000

484. Line overhead consists of _________ bytes.

  1. 1
  2. 6
  3. 9
  4. 18

Correct answer: (D)
18

485. Low-Earth-orbit (LEO) satellites have __________ orbits.

  1. equatorial
  2. polar
  3. inclined
  4. none of the above

Correct answer: (B)
polar

486. Mail services are available to network users through the _________ layer.

  1. Data link
  2. Physical
  3. Transport
  4. Application

Correct answer: (D)
Application

487. Membership in a VLAN can be based on _________.

  1. port numbers
  2. MAC addresses
  3. IP addresses
  4. all of the above

Correct answer: (D)
all of the above

488. MEO satellites are located at altitudes between km.

  1. 3000 and 5000
  2. 5000 and 10,000
  3. 5000 and 15,000
  4. none of the above

Correct answer: (C)
5000 and 15,000

489. Microwaves are _________.

  1. omnidirectional
  2. unidirectional
  3. bidirectional
  4. none of the above

Correct answer: (B)
unidirectional

490. Most popular modems available are based on the _________standards.

  1. V-series
  2. X-series
  3. VX-series
  4. none of the above

Correct answer: (A)
V-series

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