Homework answers / question archive / Saudi Electronic University IT 210 Chapter 16 1)Which of the following statements about wired and wireless LANs is correct? A) Both operate in the lower two layers of the TCP/IP protocol suite

Saudi Electronic University IT 210 Chapter 16 1)Which of the following statements about wired and wireless LANs is correct? A) Both operate in the lower two layers of the TCP/IP protocol suite

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Saudi Electronic University

IT 210

Chapter 16

1)Which of the following statements about wired and wireless LANs is correct? A) Both operate in the lower two layers of the TCP/IP protocol suite.

B)            Wired LANs operate in the lower two layers and wireless LANs operate in the lower three layers of the TCP/IP protocol suite.

C)            Wired LANs operate in the lower three layers and wireless LANs operate in the lower two layers of the TCP/IP protocol suite.

D)           Both operate in the lower three layers of the TCP/IP protocol suite.

 

2 IEEE has defined the specifications for a wireless LAN, called    , which covers the physical and data-link layers.

A) IEEE 802.3 B) IEEE 802.5 C) IEEE 802.11 D) IEEE 802.2

 

3 The CSMA/CD algorithm does not work in wireless LAN because

A) wireless host does not have enough power to work in a duplex mode. B) of the hidden station problem.

C)            signal fading could prevent a station at one end from hearing a collision at the other end.

D)           all of the choices are correct.

 

4 In IEEE 802.11, a             is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP).

A) ESS B) BSS C) CSS

D) None of the choices are correct

 

5 In IEEE 802.11, a BSS without an AP is called      . A) an ad hoc architecture

B)            an infrastructure network

C)            either an ad hoc architecture or an infrastructure network D) None of the choices are correct

                 

 

 

6 In IEEE 802.11, a BSS with an AP is sometimes referred to as     . A) an ad hoc architecture

B)            an infrastructure network

C)            either an ad hoc architecture or an infrastructure network D) None of the choices are correct

 

7 In IEEE 802.11, communication between two stations in two different BSSs usually occurs via two          .

A) BSSs B) ESSs C) APs

D) None of the choices are correct

 

8 In IEEE 802.11, a station with    mobility is either stationary (not moving) or moving only inside a BSS.

A)  no-transition B) BSS-transition C) ESS-transition

D) None of the choices are correct

 

9 In IEEE 802.11, a station with    mobility can move from one BSS to another, but the movement is confined inside one ESS.

A)  no-transition B) BSS-transition C) ESS-transition

D) None of the choices are correct

 

10 In IEEE 802.11, a station with mobility can move from one ESS to another. A) no-transition

B) BSS-transition C) ESS-transition

D) None of the choices are correct

                 

 

 

11 In IEEE 802.11, distributed coordination function (DCF) uses   as the access method.

A) CSMA/CA B) CSMA/CD C) ALOHA

D) None of the choices are correct

12 In IEEE 802.11, when a frame is going from one station in a BSS to another station in the same BSS, the address flag is     .

A) 00 B) 01 C) 10 D) 11

 

13 In IEEE 802.11, when a frame is coming from an AP and going to a station, the address flag is  .

A) 00 B) 01 C) 10 D) 11

 

14 In IEEE 802.11, when a frame is going from a station to an AP, the address flag is          . A) 00

B) 01 C) 10 D) 11

 

15 In IEEE 802.11, when a frame is going from one AP to another AP in a wireless distribution system, the address flag is             .

A) 00 B) 01 C) 10 D) 11

                 

 

 

16 In IEEE 802.11, the access method used in the PCF sublayer is                . A) contention

B) controlled C) polling

D) None of the choices are correct

 

17 In IEEE 802.11, the      is a time period used for collision avoidance. A) NAV

B) BSS C) ESS

D) None of the choices are correct

 

18 In IEEE 802.11, the addressing mechanism can include up to   addresses. A) four

B) five C) six

D) None of the choices are correct

 

19 The original IEEE 802.11 uses . A) FHSS

B) DSSS C) OFDM

D) either FHSS or DSSS

 

20 The IEEE 802.11a uses               . A) FHSS

B) DSSS C) OFDM

D) either FHSS or DSSS

 

21 The IEEE 802.11b uses              . A) FHSS

B) DSSS C) OFDM

D) either FHSS or DSSS

 

 

 

22 The IEEE 802.11g uses               . A) FHSS

B) DSSS C) OFDM

D) either FHSS or DSSS

 

23 The IEEE 802.11 FHSS uses      modulation. A) ASK

B) FSK C) PSK

D) None of the choices are correct

 

24 The IEEE 802.11 or IEEE 802.11b DSSS uses       modulation. A) ASK

B) FSK C) PSK

D) None of the choices are correct

 

25 The IEEE 802.11a, IEEE 802.11g, or IEEE 802.11n OFDM uses     modulation. A) ASK

B) FSK C) PSK

D) None of the choices are correct

 

26 Bluetooth is a               technology that connects devices (called gadgets) in a small area.

A)  wired  LAN B) wireless LAN C) VLAN

D) None of the choices are correct

 

27 In Bluetooth, multiple              form a network called a . A) scatternet; piconets

B) piconets: scatternet C)  piconets:  bluenet D) bluenet; scatternet

 

 

 

28 A Bluetooth network consists of         primary device(s) and up to        secondary devices.

A) one; five B) five; three C) two; six

D) one; seven

 

29 In Bluetooth, the current data rate is Mbps. A) 2

B) 5 C) 11

D) None of the choices are correct

 

30 The access method in Bluetooth is     . A) FDMA

B) TDD-TDMA C) CDMA

D) None of the choices are correct

 

31 In Bluetooth, the        link is used when data integrity is more important than avoiding latency.

A)           SCO

 

B)            ACL C) ACO D) SCL

 

32 Bluetooth uses            in the physical layer to avoid interference from other devices or other networks.

A) DSSS B) FHSS C) FDMA

D) None of the choices are correct