CST-3507 MidTerm

CSMA/CD stands for

Carrier Sense Multiple Access/Collision Detection

Conventional high-speed Ethernet network operating over fiber are which of the following? a. being replaced by SONET b. being replaced by ATM c. of limited use in modern LANs d. Called optical Ethernet

d

Gigabit ethernet requires the use of which of the following in the transmission of data over UTP? a. pins 4/5 7/8 b. gigabit is not possible over c. the high data lines d. all four wire pairs

d

What is the length of time an MAC address is assigned to a switchport called? a. Enable time b. Access time c. Delay time d. Aging them

d

What is the purpose of the secure tab on a switch? a. The enables the switch to select which networking devices have s selectable IP address b. The switchport will use port discovery to assign a MAC address to the port c. The switchport will use a different MAC address that the one connected to the port and will automatically enable itself. d. The switchport will automatically disable itself if a device with a different MAC address connects to the port.

d

which OSI layer combines messages or segments into packers? a. Physical b. Data Link c. Transport d. Network e. None of these answers are correct

d

MAC address can be accessed by typing the following command in the comand prompt window:

ipconfig/all

The advantages of wireless LANs include which of the following?（select all that apply） a. improve security b. user mobility in the workplace c. improved data throughput d. a cost effective media for areas difficult to wire

b, d

The main cross-connect (MC) connects to which of the following> (select all that apply) a. Floor distributors b. Telco c. Work station outlet d. ISP

b, d

Which switch mode offers the minimum switch latency (select all that apply) a. store and forward b. Fast forward c. adaptive cut-though d. cut though

b. Fast forward

"where the cable connects to a jack or a patch panel" defines which of the following? a. closet b. TCO c. termination d. none of these answers are correct

c

How many pairs of wires are in CAT6 twisted-pair cable a. 12 b. 8 c. 4 d. 6

c

What is the name of the optical-tofiber interface used at 1 gibabit? a. XENPAC b. ZYRTEC c. GIBIC d. 10GBIC

c

Which OSI layer is responsible for adding a header that includes routing information? a. Data Link b. Application c. Network d. Physical

c

Which of the following terms is used to describe that the IP address is assigned automatically when a host is connected? a. DHCP assignments b. ARP assignment c. Static assignment d. Dynamic assignment

c

A temporary storage of MAC addresses recently contacted is called which of the following? (select all that apply.) a. RARP cache b. ARP file c. ARP cache d. ARP table

c, d

A broadcast can cause a network slow-down a. true b. false

a

A gateway address defines which of the following? a. the networking device that enables hosts in a LAN to connect to anetwork outside of LAN b. the networking links between two LAN's c. the networking device that enables hosts in a LAN to connect to networ

a

Attenuation is: a. network colision signal b. atmospheric discharge c. loss of strenght over the distance d. same as crosstalk

a

Fusion-splicing is charactrized by which of the following? a. a long-term method where two fibers are fused or welded together b. requires index-matching gel c. a temporary method for splicing fiber d. an inexpensive alternative to mechnical splices

a

Hub is also called multiport repeater a. true b. false

a

TCP functions at which layer of the OSI model? a. layer 4 b. layer 6 c. layer 3 d. layer 5

a

The hopping sequence in FHSS must be known by both the transmitting and receiving units. a. True b. False

a

The term "out of range" is also called a loss of association. a. true b. false

a

What is NAT? a. Network Address Translation b. None of these answer are correct c. Network Asynchronous Transfer d. Network Address Transfer

a

Which command is used on a computer to view the contents of the ARP cache a. ARP-A b. ARP-L c. ARP-C d. ARP

a

Which of the following device interconnects two LANs running the same type of networking protocol? a. transparent bridge b. protocol hub c. transparent switch d. protocol bridge

a

Which of the following is not a private IP address? a. 172.16.31.99 b. 111.75.36.1 c. 10.0.154.100 d. 192.168.15.111

a

Which of the following terms is used to describe that a MAC address has been manually assigned? a. static assignment b. ARP assignment c. dynamic assignment d. DHCP assignment

a

"Another term for network congestion" defines which of the following? a. constricting b. bottlenecking c. constricted d. bottled e. none of these answers are correct

b

An "X" on the input switch represents a router only port a. true b. false

b

Fibers in which there is an abrupt change in the refractive index from the core to the cladding si a. Due to the actual guided optical power b. Called step-index fiber c. Used for zero dispersion applications d. Also called graded index

b

In wireless LAN configuration, the network administrator must ensure that WEP is turned off. a. true b. false

b

Like bridges, routers forward broadcast packets a. true b. false

b

Switches can be used with 802.11g but not with 802.11b a. true b. false

b

The OUI for the MAC address 00-10-A4-13-99-2E is 13992E a. true b. false

b

The list of MAC addresses and port locations for hosts connected to the bridge ports is called an association table. a. true b. false

b

The logical address is another name for a MAC address a. true b. false

b

The network address is another name for a layer 4 address a. True b. False

b

The three packets exchanged between two hosts when establishing a TCP connection in the correct order are Syn, Ack, Syn+Ack. a. true b. false

b

Using multiple access points can accomplish which of the following? a. minimize IP conflicts b. extend the range for wireless connectivity c. decrease broadcast domains d. decrease collision domains

b

What is the overall lenght limitation of the a UTP cable run from the telecomunications closet to a networking device in the work area? a. 100k meters b. 100 meters c. 10k meters d. 10 meters

b

What is the purpose of a range extender? a. It is used to extend the tuning range of the wireless router so both TCP ands UDP data traffic can be received. b. It relays the wireless signals from an access point or wireless router into areas with a weak signal or no signal at all. c. It is used with fiber optics to extend the distance d. None of these answers are correct

b

Which of the following IP addresses would not be sent across the internet? a. 19.1.122.255 b. 199.200.12.12 c. 128.252.23.10 d. 10.10.10.1

b

Which of the following acts as a transceiver to interconnect a wireless and wired LAN? a. Attachment unit interface b. access point c. ethernet unit d. Ad hoc interface

b

Which of the following is the air interface used for RFID tags? a. Token ring b. Ethernet c. Slotted aloha d. None of these answers are correct

b

what is the most common network topology a. Bus b. Star c. Mesh d. Ring

b

CAT 6 UTP is recommended for use in what？ （Select all that apply） a. the campus network backbone cabling b. the horizontal cabling for a LAN c. the work area d. is not recommended in LANs e. Only the equipment room

b, c