OMIS 460 CH 5

What type of switch connects switches to other switches? A) trunk switches B) core switches C) workgroup switches D) none of the above

B) core switches

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

B) hierarchical

What 802 Working Group creates Ethernet standards? A) 802.1 B) 802.2 C) 802.3 D) 802.11

C) 802.3

Which light wavelength dominates in LANs? A) 850 nm B) 1,310 nm C) 1,550 nm D) 1 Gbps

A) 850 nm

What organization creates Ethernet standards? (Give the most specific answer.) A) IEEE B) IETF C) ISO D) OSI

A) IEEE

What is the maximum power for POE Plus in the standard? A) 15 watts B) 25 watts C) 75 watts D) 150 watts

B) 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

B) 4-pair UTP

The official name for Ethernet addresses is the ________ addresses. A) MAC B) EUI-48 C) both A and B D) neither A nor B

B) EUI-48

Ethernet has only a single standard at the ________ layer. A) physical B) MAC C) data link D) Internet

B) MAC

________ fiber is being sold today. A) OM2 B) OM4 C) both A and B D) neither A nor B

B) OM4

22) 4-pair UTP terminates in a(n) ________ connector. A) USB B) RJ-45 C) SC D) standard telephone

B) RJ-45

In LANs, ________ typically is for ________. A) optical fiber, access lines B) UTP, access lines C) UTP, trunk lines D) none of the above

B) 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

B) a single port number for each EUI-48 address

In 802.1X, the workgroup switch is the ________. A) authentication server B) authenticator C) both A and B D) neither A nor B

B) authenticator

In optical fiber, light travels through the ________. A) core B) cladding C) both A and B

A) core

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

A) digital

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

A) drops the frame

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

A) its hierarchical topology

Modal dispersion limits transmission distance in ________. A) multimode fiber B) single-mode fiber C) both A and B D) neither A nor B

A) multimode fiber

A local area network operates ________. A) on a customer premises B) between customer premises C) both A and B D) neither A nor B

A) on a customer premises

Physical layer standards govern ________. A) frame structure B) signaling C) both A and B D) neither A nor B

B) signaling

ARP cache poisoning can be defeated using ________. A) 802.1X B) 802.3 Lock C) 802.1AE D) 802.2

C) 802.1AE

Ethernet can offer ________ priority levels. A) up to 2 B) up to 4 C) up to 8 D) Ethernet cannot offer priority levels.

C) up to 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

A) 802.1

Ethernet addresses were formerly called ________ addresses. A) MAC B) EUI-48 C) both A and B D) neither A nor B

A) MAC

At what layer is the 100BASE-TX standard? A) physical B) data link C) Internet D) physical and data link

A) physical

Ethernet standards are specified at the ________ layer. A) physical B) internet C) both A and B D) neither A nor B

A) physical

Ethernet usually has a 100 meter distance limit for ________. A) physical links B) data links C) routes D) both A and B

A) physical links

UTP categories rate the ________ of UTP cabling. A) quality B) speed C) quality-of-service performance D) error performance

A) quality

In LANs, optical fiber typically is used in ________. A) trunk lines B) access lines C) workgroup switches D) core switches

A) trunk lines

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

A) wireless access points

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

A) wireless access points

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

B) binary signaling

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

B) category 6A

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

B) creates a denial service attack on both parties

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

B) full-duplex communication

Switches in an Ethernet LAN are organized in a ________ topology. A) mesh B) hierarchical C) point-to-point D) bus

B) hierarchical

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

B) lower cost per frame handled

Strong security is needed to ________. A) collect information from remote switches B) reconfigure remote switches C) have a MIB D) reduce total costs

B) reconfigure remote switches

Fiber that has a core diameter of 8 microns is ________. A) multimode fiber B) single-mode fiber C) full duplex fiber D) exceptionally fast

B) single-mode fiber

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) speed

In binary signaling there is (are) ________ state(s). A) one B) two C) a number of D) an infinite number of

B) two

The distance between two corresponding points in adjacent cycles is the ________. A) frequency B) wavelength C) bandwidth D) span

B) wavelength

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

C) 1 Gbps

In digital signaling there is (are) ________ state(s). A) one B) two C) a small number of D) an infinite number of

C) a small number of

Ethernet standards are specified at the ________ layer. A) physical B) data link C) both A and B D) neither A nor B

C) 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

C) 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

C) 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

C) 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

C) both A and B

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

C) data field

Creating effective backup links in RSTP is ________. A) completely automatic B) simple and largely automatic C) difficult and time consuming D) impossible

C) difficult and time consuming

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

C) low cost, compared with competing technologies

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

C) modal dispersion

Managed Ethernet switches ________. A) are not standardized B) are managed by an outsourcing company C) reduce hardware costs D) reduce labor costs

C) reduce hardware costs

The longest transmission distances are possible with ________. A) USB B) UTP C) single-mode fiber D) multimode fiber

C) single-mode fiber

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

C) terminal crosstalk interference

How many wires are there is a UTP Ethernet cord? A) 1 B) 2 C) 4 D) 8

D) 8

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

D) 802.1X

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

D) designate the type of packet in the data field

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

D) for full-duplex transmission

Optical fiber's main advantage over UTP is ________. A) lower cost B) lower fragility C) higher speed D) greater distance span

D) greater distance span

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

D) multimode fiber

Ethernet standards are specified at the ________ layer. A) Internet B) transport C) both A and B D) neither A nor B

D) neither A nor B

Ethernet's hierarchical topology makes it ________. A) expensive B) reliable C) both A and B D) neither A nor B

D) neither A nor B

Four-pair UTP uses ________ connectors. A) universal B) binary C) ST or SC D) none of the above

D) none of the above

Using priority in Ethernet requires the use of ________ fields. A) QoS B) flag C) extension D) tag

D) tag

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

D) using the Rapid Spanning Tree Protocol

What type of switch connects users to the network? A) user switches B) core switches C) access switches D) workgroup switches

D) workgroup switches