NVCC ITN 100 EXAM 2 QUESTIONS AND
CORRECT ANSWERS
Question 1
Three major types of BNs are based on the devices used
Correct Answer
Switched backbones
Routed backbones
Virtual LANs
Question 2
What are the disadvantages of Star?
Correct Answer
Susceptible to traffic problems
Failure of the central site will cause complete network failure
Page 1 of 34
,Question 3
The performance of WANs can be improved by:
upgrading the circuits between the computers
increasing the demand placed on the network
downgrading the circuits between the computers
downgrading the devices that provide access to the circuits
increasing network traffic
Correct Answer
upgrading the circuits between the computers
Question 4
Hub-based Ethernet uses ______________ topology.
Correct Answer
Physical star
Question 5
inserted into Ethernet frame (e.g., 802.1Q) or encapsulates frame (e.g. ISL)
Correct Answer
VLAN tag
Question 6
VLAN disadvantages
Correct Answer
Complex
May increase management when VLAN memberships change
Layer 3 switches are more costly than L2
Page 2 of 34
,Question 7
How can we improve throughput, the total data transmitted in a given period of time?
Identify bottlenecks
Servers
Clients
Networking devices
____________
Demand
Correct Answer
Circuits
Question 8
"transparent" devices that do not change messages, only read and forward them
Correct Answer
Layer 2 switches
Question 9
Dynamic distance vector protocol used for exterior routing
Correct Answer
Border Gateway Protocol (BGP)
Question 10
__________are connections between different locations in the packet network?
Correct Answer
Permanent Virtual Circuits (PVCs)
Page 3 of 34
, Question 11
What are the advantages of Mesh?
Correct Answer
Generally short routes
Robust to the circuits loss or overloaded circuits
Question 12
Missing LAN Components:
1. Clients
2. Servers
3. Network Interface Cards (NICs)
4.___________
5. Hubs / switches / access points
6. Software
Correct Answer
Network Cables
Question 13
Datagrams are connection-oriented.
True or False
Correct Answer
False
Page 4 of 34
CORRECT ANSWERS
Question 1
Three major types of BNs are based on the devices used
Correct Answer
Switched backbones
Routed backbones
Virtual LANs
Question 2
What are the disadvantages of Star?
Correct Answer
Susceptible to traffic problems
Failure of the central site will cause complete network failure
Page 1 of 34
,Question 3
The performance of WANs can be improved by:
upgrading the circuits between the computers
increasing the demand placed on the network
downgrading the circuits between the computers
downgrading the devices that provide access to the circuits
increasing network traffic
Correct Answer
upgrading the circuits between the computers
Question 4
Hub-based Ethernet uses ______________ topology.
Correct Answer
Physical star
Question 5
inserted into Ethernet frame (e.g., 802.1Q) or encapsulates frame (e.g. ISL)
Correct Answer
VLAN tag
Question 6
VLAN disadvantages
Correct Answer
Complex
May increase management when VLAN memberships change
Layer 3 switches are more costly than L2
Page 2 of 34
,Question 7
How can we improve throughput, the total data transmitted in a given period of time?
Identify bottlenecks
Servers
Clients
Networking devices
____________
Demand
Correct Answer
Circuits
Question 8
"transparent" devices that do not change messages, only read and forward them
Correct Answer
Layer 2 switches
Question 9
Dynamic distance vector protocol used for exterior routing
Correct Answer
Border Gateway Protocol (BGP)
Question 10
__________are connections between different locations in the packet network?
Correct Answer
Permanent Virtual Circuits (PVCs)
Page 3 of 34
, Question 11
What are the advantages of Mesh?
Correct Answer
Generally short routes
Robust to the circuits loss or overloaded circuits
Question 12
Missing LAN Components:
1. Clients
2. Servers
3. Network Interface Cards (NICs)
4.___________
5. Hubs / switches / access points
6. Software
Correct Answer
Network Cables
Question 13
Datagrams are connection-oriented.
True or False
Correct Answer
False
Page 4 of 34
