Question 1

Which WAN technology defines the transmission speed in terms of the OC (optical carrier) hierarchy?

Accepted Answer

A)  Ethernet 
B)  SONET 
C)  Frame Relay 
D)  Cable 
E)  T-carrier 
A)  Ethernet 
B)  SONET 
C)  Frame Relay 
D)  Cable 
E)  T-carrier B

Question 2

Which represents INCORRECT description of the demarcation point?

Accepted Answer

A)  It is a point where Customer Premises Equipment meets Service Provider Facility. 
B)  It is generally placed at the WAN service provider's point of presence. 
C)  It becomes a dividing point of network maintenance responsibility. 
D)  At a house, the junction box is called Network Interface Device. 
E)  At a business-occupied building, the building entrance facility becomes the demarcation point. 
A)  It is a point where Customer Premises Equipment meets Service Provider Facility. 
B)  It is generally placed at the WAN service provider's point of presence. 
C)  It becomes a dividing point of network maintenance responsibility. 
D)  At a house, the junction box is called Network Interface Device. 
E)  At a business-occupied building, the building entrance facility becomes the demarcation point. B

Question 3

Which does NOT represent a leased line service/technology?

Accepted Answer

A)  T1 
B)  T3 
C)  SONET 
D)  E1 
E)  Frame Relay 
A)  T1 
B)  T3 
C)  SONET 
D)  E1 
E)  Frame Relay E

Question 4

A company has ten offices nationwide. What is the minimum number of leased lines needed if the company interconnects all of its distributed offices through a packet switched data network?

Accepted Answer

A)  One 
B)  Five 
C)  Ten 
D)  Twenty 
E)  cannot say 
A)  One 
B)  Five 
C)  Ten 
D)  Twenty 
E)  cannot say

Question 5

The following WAN standards rely on virtual circuits EXCEPT:

Accepted Answer

A)  Frame-Relay 
B)  Carrier Ethernet 
C)  Multi-Protocol Label Switching 
D)  Asynchronous Transfer Mode 
E)  Point-to-Point (PPP) 
A)  Frame-Relay 
B)  Carrier Ethernet 
C)  Multi-Protocol Label Switching 
D)  Asynchronous Transfer Mode 
E)  Point-to-Point (PPP)

Question 6

A firm wants to build a full mesh WAN connections to interconnect its four business locations through AT&T's Frame Relay WAN infrastructure. The client firm needs to order AT&T _____ different virtual circuits.

Accepted Answer

A)  24 
B)  3 
C)  4 
D)  8 
E)  12 
A)  24 
B)  3 
C)  4 
D)  8 
E)  12

Question 7

The following are general attributes of the PSDN (Packet Switched Data Network) EXCEPT:

Accepted Answer

A)  With capacity sharing, more clients can be served using the same network capacity. 
B)  PSDN is more flexible than leased lines in meeting customer demands (e.g., bandwidth). 
C)  PSDN can be utilized for voice and data communications. 
D)  WAN frames, each containing an IP packet, are multiplexed at local POPs and transported over the cloud's trunk links. 
E)  PSDN generally depends on the reliable transmission in data link for which transmission errors are detected and corrected. 
A)  With capacity sharing, more clients can be served using the same network capacity. 
B)  PSDN is more flexible than leased lines in meeting customer demands (e.g., bandwidth). 
C)  PSDN can be utilized for voice and data communications. 
D)  WAN frames, each containing an IP packet, are multiplexed at local POPs and transported over the cloud's trunk links. 
E)  PSDN generally depends on the reliable transmission in data link for which transmission errors are detected and corrected.

Question 8

Which may NOT be a server provider facility (SPF) in WAN connectivity?

Accepted Answer

A)  Central Office (CO) 
B)  Point of Presence (POP) 
C)  Access link 
D)  WAN Backbone network 
E)  Border router on the customer premise 
A)  Central Office (CO) 
B)  Point of Presence (POP) 
C)  Access link 
D)  WAN Backbone network 
E)  Border router on the customer premise

Question 9

Below figure must represent the general structure of _______ table maintained by WAN intermediary nodes such as WAN switches.

Accepted Answer

A)  Carrier Ethernet 
B)  Frame Relay 
C)  MPLS (Multi-Protocol Label Switching) 
D)  PPP (Point-to-Point) 
E)  SONET 
A)  Carrier Ethernet 
B)  Frame Relay 
C)  MPLS (Multi-Protocol Label Switching) 
D)  PPP (Point-to-Point) 
E)  SONET

Question 10

The customer network can use a ______ to access the Frame Relay network of a carrier.

Accepted Answer

A)  router 
B)  ATM access 
C)  switch 
D)  bridge 
E)  DSL modem 
A)  router 
B)  ATM access 
C)  switch 
D)  bridge 
E)  DSL modem

Question 11

Choose a CORRECT statement on WAN links.

Accepted Answer

A)  The T-1 circuit at the physical layer can carry only PPP (point-to-point) data link layer frames. 
B)  The T-1 circuit at the physical layer can carry only PSDN (ex. Frame Relay) data link layer frames. 
C)  It is possible that one data link frame (ex. Frame Relay) is encapsulated within another data link frame (ex. ATM) for delivery. 
D)  The border router that connects to a WAN link does NOT need to have LAN connectivity. 
E)  WiMax and Satellite technologies are designed for "narrowband" wireless communications. 
A)  The T-1 circuit at the physical layer can carry only PPP (point-to-point) data link layer frames. 
B)  The T-1 circuit at the physical layer can carry only PSDN (ex. Frame Relay) data link layer frames. 
C)  It is possible that one data link frame (ex. Frame Relay) is encapsulated within another data link frame (ex. ATM) for delivery. 
D)  The border router that connects to a WAN link does NOT need to have LAN connectivity. 
E)  WiMax and Satellite technologies are designed for "narrowband" wireless communications.

Question 12

Choose an INCORRECT statement regarding the SONET/SDH technology.

Accepted Answer

A)  SONET/SDH is intended for high speed leased line services on fiber optic cabling. 
B)  The SONET service is offered on the optical carrier (O
C)  data rate hierarchy. 
C)  SONET/SDH uses Time Division Multiplexing to combine lower speed channels to create a bigger pipe. 
D)  SONET/SDH is widely used by WAN carriers to define the bandwidth of their backbone networks. 
E)  The SONET infrastructure generally relies on the dual-ring architecture to improve fault-tolerance. 
A)  SONET/SDH is intended for high speed leased line services on fiber optic cabling. 
B)  The SONET service is offered on the optical carrier (O
C)  data rate hierarchy. 
C)  SONET/SDH uses Time Division Multiplexing to combine lower speed channels to create a bigger pipe. 
D)  SONET/SDH is widely used by WAN carriers to define the bandwidth of their backbone networks. 
E)  The SONET infrastructure generally relies on the dual-ring architecture to improve fault-tolerance.

Question 13

Choose an INCORRECT statement regarding the MPLS technology.

Accepted Answer

A)  It is a solution to fast forward IP packets using a mechanism similar to layer 2 switching rather than layer 3 routing. 
B)  In order to forward IP packets, MPLS relies on the label, conceptually similar to the virtual circuit. 
C)  When MPLS is active, routers utilize both label information base (LI
B)  and their routing tables to move packets. 
D)  The MPLS-enabled router is called Label Switching Router. 
E)  The label assigned to an IP packet changes while going through each router. 
A)  It is a solution to fast forward IP packets using a mechanism similar to layer 2 switching rather than layer 3 routing. 
B)  In order to forward IP packets, MPLS relies on the label, conceptually similar to the virtual circuit. 
C)  When MPLS is active, routers utilize both label information base (LI
B)  and their routing tables to move packets. 
D)  The MPLS-enabled router is called Label Switching Router. 
E)  The label assigned to an IP packet changes while going through each router.

Question 14

Which statement is correct about the Frame Relay technology?

Accepted Answer

A)  It uses switched virtual circuits for data delivery. 
B)  It is a technology designed for the leased line WAN service. 
C)  It comes with an error discovery and recover function during packet delivery. 
D)  Its frames have a high overhead and thus slow in the delivery of WAN frames. 
E)  It is much used for "both" data and voice services. 
A)  It uses switched virtual circuits for data delivery. 
B)  It is a technology designed for the leased line WAN service. 
C)  It comes with an error discovery and recover function during packet delivery. 
D)  Its frames have a high overhead and thus slow in the delivery of WAN frames. 
E)  It is much used for "both" data and voice services.

Question 15

The following frame must be carrying ___________ WAN data?

Accepted Answer

A)  Frame-Relay 
B)  Carrier Ethernet 
C)  Multi-Protocol Label Switching 
D)  Asynchronous Transfer Mode 
E)  Point-to-Point (PPP) 
A)  Frame-Relay 
B)  Carrier Ethernet 
C)  Multi-Protocol Label Switching 
D)  Asynchronous Transfer Mode 
E)  Point-to-Point (PPP)

Question 16

Which ATM Quality of Service category should deliver data in the highest priority?

Accepted Answer

A)  Available bit rate 
B)  Variable bit rate 
C)  Unspecified bit rate 
D)  Constant bit rate 
E)  All categories deliver data with the same priority 
A)  Available bit rate 
B)  Variable bit rate 
C)  Unspecified bit rate 
D)  Constant bit rate 
E)  All categories deliver data with the same priority

Question 17

How many different DLCIs (data link connection identifiers) are used for the Frame Relay-based virtual circuit from Houston HQ to Toronto Branch? Assume that the virtual circuit goes through B, C, and D WAN switches.

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
E)  16 
A)  1 
B)  2 
C)  4 
D)  8 
E)  16

Question 18

Which statement is incorrect about the Frame Relay technology?

Accepted Answer

A)  It uses permanent virtual circuits for data delivery. 
B)  Its popularity has dropped, overtaken by Carrier Ethernet. 
C)  There is no error control during packet delivery and the correction of transmission errors is left to host stations. 
D)  It is designed to be low overhead (simple header structure) and therefore efficient in frame delivery. 
E)  It is available exclusively for data delivery (not for voice) service function. 
A)  It uses permanent virtual circuits for data delivery. 
B)  Its popularity has dropped, overtaken by Carrier Ethernet. 
C)  There is no error control during packet delivery and the correction of transmission errors is left to host stations. 
D)  It is designed to be low overhead (simple header structure) and therefore efficient in frame delivery. 
E)  It is available exclusively for data delivery (not for voice) service function.

Question 19

The technological details of Frame Relay as a WAN standard are defined at the ______ layer.

Accepted Answer

A)  application 
B)  transport 
C)  network 
D)  data link 
E)  physical 
A)  application 
B)  transport 
C)  network 
D)  data link 
E)  physical

Question 20

Imagine that a firm has four offices and the business locations are fully meshed with T-1 lines. This results in ___ WAN connections.

Accepted Answer

A)  0 
B)  1 
C)  4 
D)  6 
E)  12 
A)  0 
B)  1 
C)  4 
D)  6 
E)  12

Which WAN technology defines the transmission speed in terms of the OC (optical carrier) hierarchy?

Which represents INCORRECT description of the demarcation point?

Which does NOT represent a leased line service/technology?

A company has ten offices nationwide. What is the minimum number of leased lines needed if the company interconnects all of its distributed offices through a packet switched data network?

The following WAN standards rely on virtual circuits EXCEPT:

A firm wants to build a full mesh WAN connections to interconnect its four business locations through AT&T's Frame Relay WAN infrastructure. The client firm needs to order AT&T _____ different virtual circuits.

The following are general attributes of the PSDN (Packet Switched Data Network) EXCEPT:

Which may NOT be a server provider facility (SPF) in WAN connectivity?

Below figure must represent the general structure of _______ table maintained by WAN intermediary nodes such as WAN switches.

The customer network can use a ______ to access the Frame Relay network of a carrier.

Choose a CORRECT statement on WAN links.

Choose an INCORRECT statement regarding the SONET/SDH technology.

Choose an INCORRECT statement regarding the MPLS technology.

Which statement is correct about the Frame Relay technology?

The following frame must be carrying ___________ WAN data?

Which ATM Quality of Service category should deliver data in the highest priority?

How many different DLCIs (data link connection identifiers) are used for the Frame Relay-based virtual circuit from Houston HQ to Toronto Branch? Assume that the virtual circuit goes through B, C, and D WAN switches.

Which statement is incorrect about the Frame Relay technology?

The technological details of Frame Relay as a WAN standard are defined at the ______ layer.

Imagine that a firm has four offices and the business locations are fully meshed with T-1 lines. This results in ___ WAN connections.

Networking: Fundamental Concepts

Cybersecurity: Fundamentals

Essential Layers of Computer Networking

Ip Address Planning and Management

Intermediary Devices

Wi-Fi and Cellular Network

Ethernet Lan

Cybersecurity: Threats

Cybersecurity: Network and Host Protection

Cybersecurity: Data Protection

Fundamentals of Packet Routing

Physical Layer Data Transmissions

Enterprise Network: LAN Topology, Routing, and Connectivity

Filters

Exam 12: Wide Area Network

Which WAN technology defines the transmission speed in terms of the OC (optical carrier) hierarchy?

Which represents INCORRECT description of the demarcation point?

Which does NOT represent a leased line service/technology?

A company has ten offices nationwide. What is the minimum number of leased lines needed if the company interconnects all of its distributed offices through a packet switched data network?

The following WAN standards rely on virtual circuits EXCEPT:

A firm wants to build a full mesh WAN connections to interconnect its four business locations through AT&T's Frame Relay WAN infrastructure. The client firm needs to order AT&T _____ different virtual circuits.

The following are general attributes of the PSDN (Packet Switched Data Network) EXCEPT:

Which may NOT be a server provider facility (SPF) in WAN connectivity?

Below figure must represent the general structure of _______ table maintained by WAN intermediary nodes such as WAN switches.

The customer network can use a ______ to access the Frame Relay network of a carrier.

Choose a CORRECT statement on WAN links.

Choose an INCORRECT statement regarding the SONET/SDH technology.

Choose an INCORRECT statement regarding the MPLS technology.

Which statement is correct about the Frame Relay technology?

The following frame must be carrying ___________ WAN data?

Which ATM Quality of Service category should deliver data in the highest priority?

How many different DLCIs (data link connection identifiers) are used for the Frame Relay-based virtual circuit from Houston HQ to Toronto Branch? Assume that the virtual circuit goes through B, C, and D WAN switches.

Which statement is incorrect about the Frame Relay technology?

The technological details of Frame Relay as a WAN standard are defined at the ______ layer.

Imagine that a firm has four offices and the business locations are fully meshed with T-1 lines. This results in ___ WAN connections.

Networking: Fundamental Concepts

Cybersecurity: Fundamentals

Essential Layers of Computer Networking

Ip Address Planning and Management

Intermediary Devices

Wi-Fi and Cellular Network

Ethernet Lan

Cybersecurity: Threats

Cybersecurity: Network and Host Protection

Cybersecurity: Data Protection

Fundamentals of Packet Routing

Physical Layer Data Transmissions

Enterprise Network: LAN Topology, Routing, and Connectivity

Filters