IST 233 Exam 2 Chapter 5
CAT 5e and CAT 6 wiring can carry Ethernet traffic 100 meters up to ________. A) 10 Mbps B) 100 Mbps C) 1 Gbps D) 10 Gbps
1 Gbps
What is the maximum power for POE Plus in the standard? A) 15 watts B) 25 watts C) 75 watts D) 150 watts
25 watts
What type of copper wiring is widely used in Ethernet? A) optical fiber B) 4-pair UTP C) both A and B D) neither A nor B
4-Pair UTP
How many wires are there is a UTP Ethernet cord? A) 1 B) 2 C) 4 D) 8
8
Which working group is likely to develop security standards to be used by multiple LAN/WAN technologies? A) 802.1 B) 802.e C) 802.3 D) 802.11
802.1
ARP cache poisoning can be defeated using ________. A) 802.1X B) 802.3 Lock C) 802.1AE D) 802.2
802.1AE
The ________ standard was created to prevent attackers from walking in and simply plugging a computer into a wall jack and therefore accessing the network. A) Ethernet firewall B) 802.1AE C) 802.3X D) 802.1X
802.1X
What 802 Working Group creates Ethernet standards? A) 802.1 B) 802.2 C) 802.3 D) 802.11
802.3
Which light wavelength dominates in LANs? A) 850 nm B) 1,310 nm C) 1,550 nm D) 1 Gbps
850 nm
The main benefit of parallel transmission over serial transmission is ________. A) reliability B) speed C) both A and B D) neither A nor B
B
Which of the following is relatively immune to small errors? A) analog signaling B) binary signaling C) both A and B D) neither A nor B
Binary Signaling
) Ethernet standards are specified at the ________ layer. A) physical B) data link C) both A and B D) neither A nor B
Both A and B
Link aggregation can increase trunk speed by a factor of ________. A) two B) three C) both A and B D) neither A nor B
Both A and B
The Ethernet data field contains ________. A) a packet B) the LLC subheader C) both A and B D) neither A nor B
Both A and B
Which UTP quality levels can send signals at 10 gigabits per second? A) category 6 B) category 6A C) both A and B D) neither A nor B
Both A and B
Which UTP quality levels are needed to send signals 100 meters at 10 gigabits per second? A) category 6 B) category 6A C) both A and B D) neither A nor B
Category 6A
What type of switch connects switches to other switches? A) trunk switches B) core switches C) workgroup switches D) none of the above
Core switches
What form of transmission is most resistant to transmission errors? A) digital B) analog C) Both are about equally resistant to transmission errors. D) none of the above
Digital
The official name for Ethernet addresses is the ________ addresses. A) MAC B) EUI-48 C) both A and B D) neither A nor B
EUI-48
Optical fiber's main advantage over UTP is ________. A) lower cost B) lower fragility C) higher speed D) greater distance span
Greater Distance Span
What organization creates Ethernet standards? (Give the most specific answer.) A) IEEE B) IETF C) ISO D) OSI
IEEE
Ethernet addresses were formerly called ________ addresses. A) MAC B) EUI-48 C) both A and B D) neither A nor B
MAC
Ethernet has only a single standard at the ________ layer. A) physical B) MAC C) data link D) Internet
MAC
When the light energies of two pulses arrive at overlapping times, this is ________. A) multimode transmission B) modal bandwidth C) modal dispersion D) modal interference
Model Dispersion
Ethernet standards are specified at the ________ layer. A) Internet B) transport C) both A and B D) neither A nor B
Neither A or B
________ fiber is being sold today. A) OM2 B) OM4 C) both A and B D) neither A nor B
OM4
At what layer is the 100BASE-TX standard? A) physical B) data link C) Internet D) physical and data link
Physical
Ethernet standards are specified at the ________ layer. A) physical B) internet C) both A and B D) neither A nor B
Physical
Ethernet usually has a 100 meter distance limit for ________. A) physical links B) data links C) routes D) both A and B
Physical Links
4-pair UTP terminates in a(n) ________ connector. A) USB B) RJ-45 C) SC D) standard telephone
RJ-45
Physical layer standards govern ________. A) frame structure B) signaling C) both A and B D) neither A nor B
Signaling
In this book, we use the terms Ethernet and 802.3 interchangeably. False or True
TRUE
In LANs, optical fiber typically is used in ________. A) trunk lines B) access lines C) workgroup switches D) core switches
Trunk Lines
In LANS,_____typically is for _______. A) optical fiber, access lines B) UTP, access lines C) UTP, trunk lines D) none of the above
UTP, Access Lines
An Ethernet switch knows ________. A) an IP address for each EUI-48 address B) a single port number for each EUI-48 address C) multiple port numbers for each EUI-48 address D) the entire path from the source host to the destination host
a single port number for each EUI-48 address
In digital signaling there is (are) ________ state(s). A) one B) two C) a small number of D) an infinite number of
a small number
In 802.1X, the workgroup switch is the ________. A) authentication server B) authenticator C) both A and B D) neither A nor B
authenticator
Under the standard, Ethernet switches can provide enough power over UTP for ________. A) wireless access points B) voice over IP telephones C) both A and B D) neither A nor B
both A and B
Which of the following is a benefit of using a central authentication server? A) consistency in authentication B) faster changes when authentication information needs to be changed C) both A and B D) neither A nor B
both A and B
In optical fiber, light travels through the ________. A) core B) cladding C) both A and B
core
The Ethernet length field gives the length of the ________. A) frame B) frame, less the frame check field's size C) data field D) data field plus PAD
data field
The purpose of LLC subheader is to ________. A) permit error detection B) divide the data field from the trailer C) divide the header from the data field D) designate the type of packet in the data field
designate the type of packet in the data field
Creating effective backup links in RSTP is ________. A) completely automatic B) simple and largely automatic C) difficult and time consuming D) impossible
difficult and time consuming
If an Ethernet receiver detects an error in an arriving frame, it ________. A) drops the frame B) sends an ACK to the sender C) sends a NACK to the receiver D) sends the sender a retransmission request frame
drops the frame
Optical fiber cords use two strands ________. A) for reliability through redundancy B) to form a complete electrical loop C) to double the transmission speed D) for full-duplex transmission
for full-duplex transmission
The ability to transmit in two directions simultaneously is ________. A) parallel communication B) full-duplex communication C) both A and B D) neither A nor B
full-duplex communication
In a ________ topology, there is only one possible path between any two hosts. A) mesh B) hierarchical C) both A and B D) neither A nor B
hierarchical
Switches in an Ethernet LAN are organized in a ________ topology. A) mesh B) hierarchical C) point-to-point D) bus
hierarchical
Ethernet is inexpensive thanks to ________. A) its hierarchical topology B) its use of multiple switches C) its use of regeneration D) its use of the Rapid Spanning Tree Protocol
its hierarchical topology
Ethernet becomes the dominant of LAN technology primarily because of its ________. A) high speed, compared with competing technologies B) use of multiple switches C) low cost, compared with competing technologies D) sophistication, compared with competing technologies
low cost, compared with competing technologies
Ethernet's hierarchical topology tends to create ________. A) greater reliability B) lower cost per frame handled C) both A and B D) none of the above
lower cost per frame handled
Modal dispersion limits transmission distance in ________. A) multimode fiber B) single-mode fiber C) both A and B D) neither A nor B
multimode fiber
Which of the following is used most heavily in LANs for fiber transmission links? A) modal bandwidth fiber B) 1.550 nm fiber C) single-mode fiber D) multimode fiber
multimode fiber
Ethernet's hierarchical topology makes it ________. A) expensive B) reliable C) both A and B D) neither A nor B
neither A nor B
Four-pair UTP uses ________ connectors. A) universal B) binary C) ST or SC D) none of the above
none of the above
A local area network operates____. A) on a customer premises B) between customer premises C) both A and B D) neither A nor B
on a customer premises
UTP categories rate the ________ of UTP cabling. A) quality B) speed C) quality-of-service performance D) error performance
quality
A man in the middle attack ________. A) reads traffic traveling between one host to another B) creates a denial service attack on both parties C) creates a denial of service attack against the client D) none of the above
reads traffic traveling between one host to another
Strong security is needed to ________. A) collect information from remote switches B) reconfigure remote switches C) have a MIB D) reduce total costs
reconfigure remote switches
Managed Ethernet switches ________. A) are not standardized B) are managed by an outsourcing company C) reduce hardware costs D) reduce labor costs
reduce hardware costs
Fiber that has a core diameter of 8 microns is ________. A) multimode fiber B) single-mode fiber C) full duplex fiber D) exceptionally fast
single mode fiber
The longest transmission distances are possible with ________. A) USB B) UTP C) single-mode fiber D) multimode fiber
single-mode fiber
Using priority in Ethernet requires the use of ________ fields. A) QoS B) flag C) extension D) tag
tag
) Untwisting wire pairs no more than 1.25 cm (a half inch) at their ends reduces ________. A) interference B) crosstalk interference C) terminal crosstalk interference D) none of the above
terminal crosstalk interference
In binary signaling there is (are) ________ state(s). A) one B) two C) a number of D) an infinite number of
two
Ethernet can offer ________ priority levels. A) up to 2 B) up to 4 C) up to 8 D) Ethernet cannot offer priority levels.
up to 8
Which of the following can increase reliability considerably in an Ethernet LAN? A) using a hierarchical topology B) using a mesh topology C) using a bus topology D) using the Rapid Spanning Tree Protocol
using the Rapid Spanning Tree Protocol
The distance between two corresponding points in adjacent cycles is the ________. A) frequency B) wavelength C) bandwidth D) span
wavelength
Under the standard, Ethernet switches can provide enough power over UTP for ________. A) wireless access points B) desktop computers C) both A and B D) neither A nor B
wireless access points
What type of switch connects users to the network? A) user switches B) core switches C) access switches D) workgroup switches
workgroup switches