Chapter 5 ISM 4220

A length of UTP wiring is a ________. A) cord B) fiber C) strand D) run

A) cord

A ________ is a disturbance that propagates down a transmission medium to the other side, which reads it. A) bit B) signal C) byte D) kilobyte

B) signal

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

B) signaling

Ethernet processing executed in hardware.

TRUE

The general name for a company that is given rights of way to lay wires through public areas is carrier.

TRUE

Cat 5e and Cat 6 wiring can carry Ethernet traffic 100 meters up to ________. A) 1 Gbps B) 100 Mbps C) 10 Gbps D) 10 Mbps

A) 1 Gbps

For full-duplex transmission, optical fiber normally uses ________. A) 2 strands B) 8 strands C) 4 strands D) 1 strand

A) 2 strands

What type of switch connects users to the network? A) Access switches. B) User switches. C) Core switches. D) None of the above

A) Access switches.

A network that runs on the customer premises is a ________. A) LAN B) WAN C) Both A and B D) Neither A nor B

A) LAN

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

A) a few

Companies must use carriers for WAN transmission because ________. A) companies lack rights of way B) carriers have extremely strong security C) Both A and B D) Neither A nor B

A) companies lack rights of way

In optical fiber, light travels through the ________. A) core B) cladding C) Neither A nor B

A) core

The ability to transmit in two directions simultaneously is ________. A) full-duplex communication B) parallel communication C) Both A and B D) Neither A nor B

A) full-duplex communication

Ethernet standards govern the ________ layer. A) physical B) internet C) Both A and B D) Neither A nor B

A) physical

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

A) quality

Parallel transmission is transmission over ________. A) two or more wire pairs B) 4 wire pairs

A) two or more wire pairs

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

B) 802.3.

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 ________ serves a city and its suburbs. A) PAN B) MAN C) Both A and B D) Neither A nor B

B) MAN

What type of interference is most frequently a problem? A) Crosstalk interference. B) Terminal crosstalk interference. C) Noise interference. D) Electromagnetic interference.

B) Terminal crosstalk interference.

Multimode fiber distance is limited primarily by ________. A) absorptive attenuation B) modal dispersion C) Both A and B about equally

B) modal dispersion

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

B) multimode fiber

A LAN is a network that ________. A) links different sites together B) provides service within a site C) provides international service D) All of the above

B) provides service within a site

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

B) snap

Untwisting wire pairs no more than 1.25 cm (a half inch) at their ends reduces ________. A) attenuation B) terminal crosstalk interference C) interference D) crosstalk interference

B) terminal crosstalk interference

In LANs, optical fiber typically is used in ________. A) access lines B) trunk lines C) Both A and B D) Neither A nor B

B) trunk lines

Ethernet standards govern the ________ layer. A) physical B) data link C) Both A and B D) Neither A nor B

C) Both A and B

In Ethernet, limiting UTP cord runs to 100 meters normally limits ________ to an acceptable level. A) noise errors B) attenuation C) Both A and B D) Neither A nor B

C) Both A and B

The main benefit of parallel transmission over serial transmission is ________. A) reliability B) speed 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 6A. B) Category 6. C) Both A and B D) Neither A nor B

C) Both A and B

What form of transmission is most resistant to transmission errors? A) Digital. B) Binary. C) Both are about equally resistant to transmission errors.

C) Both are about equally resistant to transmission errors.

What type switch connects switches to other switches? A) Trunk switches. B) Workgroup switches. C) Core switches. D) None of the above

C) Core switches.

Modal bandwidth is a measure of ________. A) propagation speed B) multimode fiber quality C) fiber quality D) modal dispersion

C) fiber quality

A WAN is a network that ________. A) provides service within a site B) provides service within about a mile C) links different sites together D) All of the above

C) links different sites together

When the light energies of two pulses arrive at overlapping times, this is ________. A) multimode transmission B) modal dispersion C) modal bandwidth D) modal interference

C) modal dispersion

In the UTP wiring used in LANs, how many wire pairs are there in a cord? A) 2 B) 8 C) 1 D) 4

D) 4

In the UTP wiring used in LANs, how many wires are there in a cord? A) 8 B) 1 C) 2 D) 4

D) 8

What organization creates Ethernet standards? A) ISO. B) OSI. C) IETF. D) IEEE.

D) IEEE.

Ethernet standards govern the ________ layer. A) internet B) transport C) Both A and B D) Neither A nor B

D) Neither A nor B

LAN speeds are faster than WAN speeds. This is because of ________. A) the slow corporate adoption of newer WAN technologies B) technological limitations C) regulatory limitations D) economic reasons

D) economic reasons

52) Optical fiber cords use two strands ________. A) to double the transmission speed B) to form a complete electrical loop C) for reliability through redundancy D) for full-duplex communication

D) for full-duplex communication

Untwisting wire pairs no more than 1.25 cm (a half inch) at their ends reduces ________. A) attenuation B) interference C) crosstalk interference D) terminal crosstalk interference

D) terminal crosstalk interference

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

D) two

802.11 is the Working Group that creates Ethernet standards.

FALSE

Analog signaling is relatively immune to small errors.

FALSE

In LANs, UTP typically is used for trunk lines.

FALSE

In LANs, workgroup switches must be able to carry more traffic than core switches.

FALSE

The ability to transmit in two directions simultaneously is called parallel transmission.

FALSE

A company has more control over its ________ technology.

LAN

Which type of transmission is more widely used today? A) Serial. B) Parallel. C) Both are used about equally.

Serial

Binary signaling is relatively immune to small errors.

TRUE

Clock cycles are necessary in binary transmission.

TRUE

Digital signaling is relatively immune to small errors.

TRUE

Serial transmission is transmission over a single wire pair.

TRUE

The Ethernet standard limits UTP propagation distances to 100 meters at all speeds up to 1 Gbps.

TRUE

Typical LAN speeds are faster than typical WAN speeds.

TRUE

Untwisting wire pairs no more than 1.25 cm (a half inch) at their ends eliminates terminal crosstalk interference.

TRUE