Chapter 11 Flashcards
1
Q
In what type of topology is each site connected to two other sites, providing redundancy? A) bus topology B) ring topology C) star topology D) circle topology
A
B) ring topology
2
Q
What is the maximum throughput of a DS3 connection? A) 1.544 B) 3.152 C) 44.736 D) 274.176
A
C) 44.736
3
Q
How many channels exist in a T1 connection? A) 1 B) 24 C) 48 D) 96
A
B) 24
4
Q
In an ISDN connection, what is the size throughput did a single B channel provide? A) 32 Kbps B) 48 Kbps C) 64 Kbps D) 96 Kbps
A
C) 64 Kbps
5
Q
In a PON system, an OLT contains a splitter that splits each port into how many logical channels? A) 16 B) 32 C) 64 D) 96
A
B) 32
6
Q
What is the size of an ATM packet? A) 48 bytes B) 53 bytes C) 64 bytes D) 84 bytes
A
B) 53 bytes
7
Q
Which option below is an advantage of leasing a frame relay circuit over leasing a dedicated circuit?
A) You are guaranteed to receive the maximum amount of bandwidth specified in the circuit contract
B) You pay only for the bandwidth you’ve used
C) The paths that your data will take are always known
D) Frame relay is a newly established network technology with more features than other technology
A
B) You pay only for the bandwidth you’ve used
8
Q
What xDSL standard is the most popular? A) VDSL B) G.Lite C) ADSL D) HDSL
A
C) ADSL
9
Q
What xDSL version provides a maximum throughput of 24 Mbps downstream and 3.3 Mbps upstream? A) VDSL B) ADSL C) ADSL2+M D) HDSL
A
C) ADSL2+M
10
Q
The DTE or endpoint device for a leased line is known as which device below? A) CSU/DSU B) cable modem C) DSL modem D) ISDN modem
A
A) CSU/DSU
11
Q
What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises? A) OC-3 B) OC-12 C) OC-48 D) OC-96
A
C) OC-48
12
Q
What is the maximum amount of throughput provided by an OC-12? A) 51.84 Mbps B) 155.52 Mbps C) 622.08 Mbps D) 1244.16 Mbps
A
C) 622.08 Mbps
13
Q
What is the frequency range of the C-band that is used by satellites? A) 11.5-2.7 GHz B) 2.7-3.5 GHz C) 3.4-6.7 GHz D) 12-18 GHz
A
C) 3.4-6.7 GHz
14
Q
What Layer 3 technology is employed by distance-vector routing protocols in which a router knows which of its interfaces a routing update and will not retransmit, or advertise, that same update on the same interface? A) split horizon B) round robin C) reverse path check D) spanning tree protocol
A
A) split horizon
15
Q
What protocol is commonly used to aggregate/bond T-1/ T-3 lines? A) STP B) MLPPP C) MPLS D) PPTP
A
B) MLPPP
16
Q
When copper cabling is used to carry T-1 traffic, what kind of connector is used? A) RJ-11 B) RJ-25 C) RJ-45 D) RJ-48
A
D) RJ-48
17
Q
When using frame relay, what is the name of the identifier that routers use to determine which circuit to send frames to? A) SVC identifier B) data link connection identifier C) PVC identifier D) frame path identifier
A
B) data link connection identifier
18
Q
Which version of DOCSIS provides 38 Mbps per channel and requires a minimum of 4 channels to be used? A) DOCSIS 1 B) DOCSIS 2 C) DOCSIS 3 D) DOCSIS 4
A
C) DOCSIS 3
19
Q
The best 802.11n signal can travel approximately how far? A) 1 mile B) 1/2 mile C) 1/4 mile D) 300 feet
A
C) 1/4 mile
20
Q
In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol? A) Metro Carrier Transport B) Carrier Ethernet Transport C) Intra-city Ethernet D) Ethernet SONET
A
B) Carrier Ethernet Transport
21
Q
A MAN connection is also known as which two terms below? A) Ethernet MAN B) Metro Ethernet C) Carrier Ethernet D) Packet MAN
A
A) Ethernet MAN
B) Metro Ethernet
22
Q
What two competing standards exist for cell phone networks? A) ATM B) WiMAX C) GSM D) CDMA
A
C) GSM
D) CDMA
23
Q
What two network protocols below rely on virtual circuits? A) SDH B) SONET C) ATM D) frame relay
A
C) ATM
D) frame relay
24
Q
Frame relay relies on what two different types of virtual circuits? A) LVC B) PVC C) TVC D) SVC
A
B) PVC
D) SVC
25
Q
At what two layers of the OSI model are LAN and WAN protocols likely to differ? A) Layer 4 B) Layer 2 C) Layer 1 D) Layer 3
A
B) Layer 2
C) Layer 1
