PLC Ethernet Quiz

The unique Ethernet address is embedded in the _____ by the manufacturer. a. NIC b. MAC c. HEC d. OUI

a. NIC

A sliding window algorithm is used to process and resequence VTS and reduce ______ a. differential delay b. collisions c. link access processing d. set nullification

a. differential delay

An IP address has two parts: a. network and node b. host and node c. host and class d. domain and network

a. network and node

Another term for a hub is a ______ a. repeater b. transmitter c. switch d. bridge

a. repeater

______ topology is created when bus and star topologies are connected a. tree b. ring c. root d. branch

a. tree

VTs that travel without being joined together are ______ a. virtually concatenated b. concatenated c. virtual containers d. virtual tributaries

a. virtually concatenated

28 VT1.5s provide _____ Mb/s of usable bandwidth a. 54 b. 43 c. 50 d. 28

b. 43

A healthy Ethernet network should have less than ___% of its traffic dedicated to retransmissions from collisions. a. 3 b. 5 c. 13 d. 15

b. 5

SONET APS must occur within ______ a. 5 ms b. 50 ms c. 100 ms d. 5 min

b. 50 ms

How many VT1.5s are required for 10 Mb/s Ethernet over SONET? a. One b. Seven c. Ten d. None of the above

b. Seven

The central device in a star topology is a ______ a. router b. hub c. bridge d. switch

b. hub

Concatenated STSs are separated using pointers carried in _________ overhead in the STS frame a. section b. line c. path d. VT

b. line

IP resides in the OSI _________ layer a. physical b. network c. data link d. transport

b. network

The process that compresses 8B/10B encoded signals into 64B/66B super blocks is called _______ a. LAPS b. transparent GFP c. frame-mapped GFP d. PLI

b. transparent GFP

The line rate for the first Ethernet was ______ a. 54-kb/s b. 9600 baud c. 10 Mb/s d. 2.94 Mb/s

c. 10 Mb/s

The Fast Ethernet standard applies to _____ Ethernet a. 10 Mb/s b. 1000 Mb/s c. 100 Mb/s d. 10 gigabit

c. 100 Mb/s

There are ____ VT1.5s in an STS-1 a. 32 b. 21 c. 28 d. 24

c. 28

VLAN tagging adds _______ to the IEEE 802.3 Ethernet frame a. 2 bytes b. 8 bytes c. 4 bytes d. 1 byte

c. 4 bytes

Which is not a way to reduce collisions on an Ethernet network? a. Reduce the number of users b. Reduce the number of PCs c. Reduce the number of collision domains d. Reduce the number of Ethernet frames

c. Reduce the number of collision domains

______ is used to prevent loops on an Ethernet network. a. Classless interdomain routing b. Spanning Tree Protocol c. A dot address d. A MAC address

c. Reduce the number of collision domains

______ is configured with one trunk cable a. Monocabling b. Centralized topography c. Unitrunking d. Bus topology

d. Bus topology

A unique network number is requested from the ______ a. Metro Ethernet Forum b. IEEE c. ITU-T d. Network Information Center

d. Network Information Center

______ concentrate on network function instead of physical functions a. Bridges b. Switches c. Hubs d. Routers

d. Routers

A group of PCs, servers and other network resources that behave as if they are connected to a single network segment is called a ______ a. LAN b. MAN c. WAN d. VLAN

d. VLAN

An STS-1 contains enough VT1.5s to support up to ___ 10 Mb/s Ethernet network(s) a. one b. two c. three d. four

d. four