Chapter 2: Network Devices
TRUE/FALSE
1. The number of nodes on a network and the length of cable used influence the quality of
communication on the network.
2. Repeaters and hubs reformat data structures, so they can connect networks that require different types
of frames.
3. The IEEE standards for WLANs use unlicensed, but not unregulated, radio frequencies.
4. Bridges operate at the Network layer of the OSI model.
5. Like bridges, switches operate at the Network layer of the OSI model.
MULTIPLE CHOICE
1. On analog networks, devices that boost the signal are called ____.
a.
routers
c.
hubs
b.
amplifiers
d.
repeaters
2. Devices that “see” the traffic of other devices are said to be on the same ____ as those devices.
a.
ring
c.
level
b.
block
d.
collision domain
3. If a single access point is available in infrastructure mode, then the mode is said to be a(n) ____.
a.
Virtual Service Set (VSS)
c.
Basic Service Set (BSS)
b.
Extended Service Set (ESS)
d.
Logical Service Set (LSS)
4. Typically WLANs involve multiple access points connected to various switches in the network. This
type of infrastructure mode is known as a(n) ____.
a.
Extended Service Set (ESS)
c.
Virtual Service Set (VSS)
b.
Basic Service Set (BSS)
d.
Logical Service Set (LSS)
5. A ____ filters traffic between network segments by examining the destination MAC address.
a.
hub
c.
router
b.
repeater
d.
bridge
6. ____ increase network performance by reducing the number of frames transmitted to the rest of the
network.
a.
Switches
c.
Hubs
b.
Gateways
d.
Amplifiers
7. Switches filter based on ____ addresses.
a.
logical
c.
MAC
b.
IP
d.
TCP/IP
8. ____ provide filtering and network traffic control on LANs and WANs. These devices can connect
multiple segments and multiple networks.
a.
Hubs
c.
Switches
b.
Routers
d.
Bridges
9. Routers operate at the ____ layer of the OSI model.
a.
Network
c.
Data Link
b.
Transport
d.
Physical
10. When TCP/IP is used on an internetwork, the logical address is known as a(n) ____ address.
a.
MAC
c.
physical
b.
IP
d.
domain
11. ____ are commonly used to connect networks to the Internet.
a.
Bridges
c.
Routers
b.
Switches
d.
Hubs
12. A(n) ____ functions as both a bridge for nonroutable protocols and a router for routable protocols.
a.
switch
c.
amplifier
b.
hub
d.
brouter
13. A(n) ____ is usually a combination of hardware and software. Its purpose is to translate between
different protocol suites.
a.
amplifier
c.
hub
b.
gateway
d.
router
14. ____ have the most negative effect on network performance.
a.
Routers
c.
Switches
b.
Bridges
d.
Gateways
15. ____ is a network access method (or media access method) originated by the University of Hawaii.
a.
FDDI
c.
Ethernet
b.
AppleTalk
d.
Token Ring
16. Ethernet uses ____ to prevent data packets from colliding on the network.
a.
CSMA/CD
c.
AppleTalk
b.
CSMA/CA
d.
LPC
17. A ____ is the physical area in which a frame collision might occur.
a.
signal domain
c.
jam domain
b.
jam area
d.
collision domain
18. ____ Ethernet uses the same network access method (CSMA/CD) as common 10BaseT Ethernet, but
provides 10 times the data transmission rate.
a.
Fast
c.
10 Gigabit
b.
Gigabit
d.
Terabit
19. Fast Ethernet is defined under the IEEE ____ standard.
a.
802.3b
c.
802.3u
b.
802.3f
d.
802.3z
20. In ____ communications, devices can send and receive signals, but not at the same time.
a.
full-duplex
c.
duplex
b.
half-duplex
d.
wire-duplex
21. In ____ communications, devices can send and receive signals simultaneously.
a.
full-duplex
c.
half-duplex
b.
mutex
d.
single-duplex
COMPLETION
1. ____________________ usually refers to the physical layout of network cable and devices.
2. ____________________ provide cell-based areas where wireless clients such as laptops and PDAs can
connect to the network by associating with the access point.
3. ____________________ is the breaking down of a single heavily populated network segment into
smaller segments, or collision domains, populated by fewer nodes.
4. A switch opens a(n) ____________________ between the source and the destination. This prevents
communications between just two computers from being broadcast to every computer on the network
or segment.
5. When machines must share a wire and compete for available bandwidth with other machines, they
experience ____________________.
MATCHING
Match each item with a statement below:
a.
Attenuation
f.
Broadcast storm
b.
Hub
g.
Microsegmentation
c.
Service Set Identifier (SSID)
h.
Internetworks
d.
Segment
i.
Broadcast domain
e.
Broadcast frame
1. a group of network devices that will receive LAN broadcast traffic from each other
2. a generic connection device used to tie several networking cables together to create a link between
different stations on a network
3. preventing communications between just two computers from being broadcast to every computer on
the network or segment
4. when two or more stations engage in the transmission of excessive broadcast traffic
5. networks connected by multiple routers
6. a part of a network that is divided logically or physically from the rest of the network
7. wireless network name
8. a frame destined for all computers on the network
9. degradation of signal clarity
SHORT ANSWER
1. Describe active and passive hubs.
2. What are the advantages of using repeaters and hubs?
3. Briefly describe the components of a wireless network.
ANS:
4. What are the steps for adding a WLAN to a LAN?
ANS:
5. Briefly describe transparent bridges.
6. What are the advantages of using a bridge?
7. What are the advantages of using switches?
8. What are the disadvantages of using routers on the network?
9. Briefly describe Gigabit Ethernet.
10. What are the benefits of using full-duplex?