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CIT_212-computer networking > Study for final > Flashcards

Study for final Flashcards

1
Q 
Which three technologies have presented challenges to network administrators when designing corporate networks? (Choose three.)
--collaboration tools 
 personal devices 
PoE 
QoS 
virtualization
A

collaboration tools
personal devices
virtualization

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2
Q

In a new network design, an organization has decided to manage all of its wireless access points using a wireless network controller. In which network design module of the campus network architecture would the centralized wireless network controllers be found?

A

services

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3
Q

In a hierarchical network design, which layer is characterized by the use of port security and Power over Ethernet (PoE)?

A

access

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4
Q

Which layer of the hierarchical design model is a control boundary between the other layers?

A

distribution

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5
Q

What is a definition of a two-tier LAN network design?

A

distribution and core layers collapsed into one tier, and the access layer on a separate tier

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6
Q

what is the structured engineering principle for hierarchical network design with the description:
The network has been designed with the following sections: enterprise campus, services block, data center, and Internet edge.

A

modularity

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7
Q

Which Cisco Borderless Network service is used to deliver anywhere, anytime access to information from any device?

A

Cisco Motion

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8
Q

Branch office networks and corporate headquarter networks can be connected together using
_______
VPN connections through the Internet infrastructure.

A

site to site

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9
Q

What are two common types of circuit-switched WAN technologies?

A

PSTN

ISDN

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10
Q

devices and inside wiring that are located on the enterprise edge and connect to a carrier link?

A

customer premises equipment

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11
Q

a point that is established in a building or complex to separate customer equipment from service provider equipment

A

demarcation point

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12
Q

customer devices that pass the data from a customer network or host computer for transmission over the WAN

A

data terminal equipment

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13
Q

devices that put data on the local loop

A

data communications equipment

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14
Q

Which statement correctly describes a WAN technology?​

  • The 53-byte ATM cell operates more efficiently for big frames.
  • MPLS can be used to deliver any type of packet between sites.
  • VSATs create a public WAN while providing connectivity to remote locations.
A

MPLS can be used to deliver any type of packet between sites.

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15
Q

Which one of the WAN technologies is inadequate for video traffic but operates adequately for voice traffic?

A

ISDN BRI

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16
Q 
Which two WAN infrastructure services are examples of private connections? 
-T1/E1 
-wireless
-DSL
-cable
frame relay
A

T1/E1

Frame Relay

17
Q 
A new corporation needs a data network that must meet certain requirements. The network must be fast and reliable to transmit secure video conferencing calls between two branches. If cost is not a consideration, which two types of WAN infrastructure would best meet the requirements? (Choose two.)
_ dedicated 
-switched
private infrastructure
internet
-public infra
A

dedicated

private infrastructure

18
Q

Which two functions are provided by the NCP during a PPP connection?

A

bringing the network layer protocol or protocols up and down

- the negotiation of options for the IP protocol

19
Q

With which layers of the OSI model do the PPP control protocols interface?

A

NCP interfaces with Layer 3; LCP interfaces with Layer 1

20
Q

What is the purpose of a null modem cable?

A

to connect between two DTE devices

21
Q

How many DS0 channels are bounded to produce a 1.544 Mb/s DS1 line?

A

24

22
Q

The default encapsulation for WAN interfaces is
_______
on Cisco

A

hdlc

23
Q

Which two statements are true about time-division multiplexing (TDM)?
_TDM relies on Layer 3 protocols to operate.
-Multiple channels can transmit over a single link.
_Original data streams must be reconstructed at the destination.
It allows information from multiple channels to be allocated bandwidth on multiple wires.

A

Multiple channels can transmit over a single link.

Original data streams must be reconstructed at the destination.

24
Q

Which command would be used to troubleshoot serial interface encapsulation?

A

debug ppp​ packet

25
Q

what is the PPP field frame: a field with 00000011 so that data link establishment is not required

A

control

26
Q

whati s the PPP frame field: one (if compression allowed) or two bytes

A

protocol

27
Q

What is an advantage of configuring subinterfaces in a Frame Relay environment?

A

reduces split horizon issues

28
Q

Which bit is set by a Frame Relay switch to inform the source station that there is congestion on the network?

A

BECN

29
Q

What are two reasons Frame Relay is more cost-effective than leased lines?

A

uses less equipment

shares bandwidth across a large customer base

30
Q

The maximum average data rate that a service provider guarantees to a customer is known as the

A

CIR
Correct Answer
Committed Information Rate

31
Q

What are three mechanisms used by Frame Relay to reduce network overhead caused by congestion?

A

BECN FECN
Correct Answer
DE

32
Q

hat is different about using IPv6 with Frame Relay compared to using IPv4?

A

the protocol to obtain the Layer 3 address of the opposite device

33
Q

A router in a Frame Relay network needs to forward a message received from a host. What two methods does the router use to identify the correct VC to forward the message? (Choose two.)

A

The router searches Inverse ARP tables for maps of DLCIs to IP addresses.
-A table of static mappings can be searched.

34
Q

If Inverse ARP is not available for use, how can a network administrator still provide a Frame Relay connection to the service provider and forward routing updates?

A

Use static mapping with the broadcast keyword.

35
Q

What keyword is used in a Frame Relay static map configuration when OSPF is used among various sites of a corporation?

A

broadcast

36
Q

In what situation would it be best to use Frame Relay subinterfaces?

A

any time EIGRP or OSPF is used across the Frame Relay cloud

37
Q

what is the term for:

frame relay- used to obtain neighbor IP address

A

ARP

38
Q

what is the term for:

used as a result of congestion frame relay

A

FECN

39
Q

what is the term for:

a unique connection number

A

DLCI

CIT_212-computer networking (25 decks)

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