The Candid Test On CCENT - WAN
IT certifications show employers that you have demonstrable skills in that area, making them more likely to want to hire you and leading to higher salary offers. What do you know about wide area networks from you CCENT course? Take up the candid test below and understand more on the topic.
- 1.
Cables used to connect to external CSU/DSU (choose 5)
- A.
EIA/TIA-232 (RS232)
- B.
EIA/TIA-449
- C.
Rolled
- D.
Serial
- E.
RJ-48
- F.
V.35
- G.
RJ-59
- H.
X.21
- I.
EIA-530
Correct Answer(s)
A. EIA/TIA-232 (RS232)
B. EIA/TIA-449
F. V.35
H. X.21
I. EIA-530 -
- 2.
Connection to an integrated internal CSU/DSU uses which cable?
- A.
EIA/TIA-232
- B.
EIA/TIA-449
- C.
Rolled
- D.
Serial/
- E.
RJ-48/
- F.
V.35/
- G.
RJ-59/
- H.
X.21/
- I.
EIA-530/
Correct Answer
E. RJ-48/Explanation
You would plug a RJ-48 cable to an RJ-48 port in the router serial interface cardRate this question:
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- 3.
The clock rate is expressed in ____ while bandwidth is ____ (Choose 2)
- A.
Bit
- B.
Kbit
- C.
Bps
- D.
Kbps
- E.
Mbps
- F.
Bytes
- G.
Kbytes
Correct Answer(s)
A. Bit
B. KbitExplanation
Clock rate is expressed in bits because it measures the number of clock cycles that a processor can execute per second. Bandwidth, on the other hand, is expressed in Kbits because it measures the amount of data that can be transmitted in a given amount of time, typically in kilobits per second.Rate this question:
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- 4.
Clock rate (choose 2)
- A.
Is set on the devices at the end of a DTE cable
- B.
Is set on the devices at the end of a DCE cable
- C.
Devices at the end of the DCE cable receives the clocking
- D.
Devices at the end of the DTE cable receives the clocking
Correct Answer(s)
B. Is set on the devices at the end of a DCE cable
D. Devices at the end of the DTE cable receives the clockingExplanation
The clock rate is set on the devices at the end of a DCE cable because the DCE (Data Communications Equipment) device is responsible for providing the clocking signal in a serial communication link. On the other hand, the devices at the end of the DTE (Data Terminal Equipment) cable receive the clocking signal from the DCE device. This arrangement ensures that the communication between the devices is synchronized and data is transmitted at the correct speed.Rate this question:
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- 5.
To set a clock rate of 250000 bits on router A with a serial interface Serial 0/0/0, you would type
- A.
RouterA>clock rate 250000
- B.
RouterA(config)#clockrate 250000
- C.
RouterA(config-if)#clockrate 250
- D.
RouterA(config-if)#clock rate 250000
Correct Answer
D. RouterA(config-if)#clock rate 250000Explanation
The correct answer is "RouterA(config-if)#clock rate 250000". This is because when configuring the clock rate on a serial interface, the command to use is "clock rate" followed by the desired rate in bits per second. In this case, the desired rate is 250000 bits per second, so the correct command is "clock rate 250000".Rate this question:
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- 6.
The combination of multiple slow speed lines and channels into one faster line or channel is called
- A.
Time Division Multiplexing (TDM)
- B.
Channel Division Multiplexing (CDM)
- C.
Line Aggregation Combination Technique (LACT)
- D.
Line Channel Multiplexing (LCM)
Correct Answer
A. Time Division Multiplexing (TDM)Explanation
Time Division Multiplexing (TDM) is the correct answer because it refers to the process of combining multiple slow speed lines or channels into one faster line or channel. TDM works by dividing the time into fixed intervals and allocating each interval to different lines or channels. This allows multiple signals to be transmitted simultaneously over a single transmission medium, maximizing the utilization of the available bandwidth. TDM is commonly used in telecommunications and networking to efficiently transmit data, voice, and video signals.Rate this question:
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- 7.
A DS0 is 64 kbps. (Pick 2)
- A.
In America, a T1 has 24 DS0 and in Europe, an E1 has 32 DS0
- B.
In America, a T1 has 24 DS0 plus 8 kbps overhead and in Europe, an E1 has 32 DS0
- C.
In America, a T3 has 28 DS1 and in Europe an E3 has 16 E1
- D.
In America, a T3 has 28 DS1 plus management overhead and in Europe an E3 has 16 E1 plus management overhead
Correct Answer(s)
B. In America, a T1 has 24 DS0 plus 8 kbps overhead and in Europe, an E1 has 32 DS0
D. In America, a T3 has 28 DS1 plus management overhead and in Europe an E3 has 16 E1 plus management overheadExplanation
In America, a T1 has 24 DS0 plus 8 kbps overhead and in Europe, an E1 has 32 DS0. This means that a T1 line in America can support 24 separate 64 kbps channels for data transmission, with an additional 8 kbps used for overhead purposes. Similarly, an E1 line in Europe can support 32 separate 64 kbps channels. Additionally, in America, a T3 line has 28 DS1 channels with management overhead, while in Europe, an E3 line has 16 E1 channels with management overhead.Rate this question:
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- 8.
The fields within a non-Cisco proprietary HDLC frame are (choose 5)
- A.
Flag
- B.
Address
- C.
Control
- D.
Data
- E.
FCS
- F.
Type
- G.
CRC
- H.
Destination
- I.
Source
Correct Answer(s)
A. Flag
B. Address
C. Control
D. Data
E. FCSExplanation
The fields within a non-Cisco proprietary HDLC frame are Flag, Address, Control, Data, and FCS. The Flag field marks the beginning and end of the frame. The Address field identifies the destination or source device. The Control field contains information about the frame type and flow control. The Data field carries the actual data being transmitted. The FCS (Frame Check Sequence) field is used for error detection.Rate this question:
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- 9.
Cisco proprietary HDLC frame include 1 extra field, which is (choose 1)
- A.
Flag
- B.
Address
- C.
Control
- D.
Data
- E.
FCS
- F.
Type
- G.
CRC
- H.
Destination
- I.
Source
Correct Answer
F. TypeExplanation
Cisco proprietary HDLC frames include an extra field called "Type." This field is used to identify the type of data being transmitted in the frame. It helps the receiving device understand how to interpret the data and process it accordingly.Rate this question:
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- 10.
HDLC is a
- A.
Layer 1 protocol used for point-to-point WAN serial links.
- B.
Layer 2 encapsulation method used for point-to-point WAN serial links.
- C.
Layer 2 industry standard protocol method used for point-to-point WAN serial links. It is incompatible with Cisco proprietary HDLC protocol. It is responsible for error checking, packet delivering, and packet type determination.
- D.
Layer 2 Cisco proprietary protocol used for point-to-point WAN serial links and is responsible for error checking, packet delivering, and packet type determination.
Correct Answer
C. Layer 2 industry standard protocol method used for point-to-point WAN serial links. It is incompatible with Cisco proprietary HDLC protocol. It is responsible for error checking, packet delivering, and packet type determination.Explanation
HDLC is a Layer 2 industry standard protocol method used for point-to-point WAN serial links. It is incompatible with Cisco proprietary HDLC protocol. It is responsible for error checking, packet delivering, and packet type determination.Rate this question:
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- 11.
HDLC (choose 2)
- A.
Is only available on Cisco router
- B.
Is only available on non-Cisco routers
- C.
Available on both Cisco and non-Cisco routers
- D.
Non-Cisco routers use non-Cisco HDLC protocol version. While the Cisco routers use Cisco HDLC proprietary protocol version
Correct Answer(s)
C. Available on both Cisco and non-Cisco routers
D. Non-Cisco routers use non-Cisco HDLC protocol version. While the Cisco routers use Cisco HDLC proprietary protocol versionExplanation
HDLC (High-Level Data Link Control) is a data link layer protocol used for point-to-point and multipoint communication. It is a standard protocol that is available on both Cisco and non-Cisco routers. However, there is a difference in the protocol version used. Non-Cisco routers use the non-Cisco HDLC protocol version, while Cisco routers use the Cisco HDLC proprietary protocol version.Rate this question:
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- 12.
Point-to-point protocol is similar to that of Cisco proprietary HDLC header because it has (choose 6)
- A.
Flag
- B.
Address
- C.
Control
- D.
Data
- E.
FCS
- F.
Type
- G.
CRC
- H.
Destination
- I.
Source
Correct Answer(s)
A. Flag
B. Address
C. Control
D. Data
E. FCS
F. TypeExplanation
Point-to-point protocol (PPP) and Cisco proprietary HDLC header have similarities in terms of the header fields they include. Both protocols have a Flag field, which marks the beginning and end of the frame. They also include an Address field, which identifies the destination device. The Control field is used for flow control and error checking. The Data field carries the actual payload of the frame. The FCS (Frame Check Sequence) field is used for error detection. Lastly, both protocols include a Type field, which indicates the protocol being used. However, CRC (Cyclic Redundancy Check) is not a field included in the Cisco proprietary HDLC header.Rate this question:
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- 13.
PPP is the choice of protocol when connecting a Cisco and non-Cisco router because PPP’s frame includes a(n) _____ field (choose 1)
- A.
Flag
- B.
Address
- C.
Control
- D.
Data
- E.
FCS
- F.
Type
- G.
CRC
- H.
Destination
- I.
Source
Correct Answer
F. TypeExplanation
PPP is the choice of protocol when connecting a Cisco and non-Cisco router because PPP's frame includes a "Type" field. This field is used to identify the protocol encapsulated within the PPP frame, allowing the routers to understand and process the data correctly. By using the "Type" field, PPP ensures compatibility between Cisco and non-Cisco routers, making it the preferred choice for interconnecting them.Rate this question:
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- 14.
Frame Relay is a
- A.
Packet switching service because it can switch packets from one point to another using Permanent Virtual Circuits (PVC).
- B.
Circuit switching service because it uses Permanent Virtual Circuits (PVC) to switch packets.
- C.
Cell switching service because it encapsulates data into layer 2 frame and send it to its destination using PVCs.
- D.
Is just another type of leased line protocol because for Frame Relay to work, customers still have to have a physical connection between the customers’ routers and the Telco’s Frame Relay Switch.
Correct Answer
A. Packet switching service because it can switch packets from one point to another using Permanent Virtual Circuits (PVC).Explanation
Frame Relay is a packet switching service because it can switch packets from one point to another using Permanent Virtual Circuits (PVC). This means that instead of establishing a dedicated physical connection between two points, Frame Relay uses virtual circuits to transmit packets of data. These virtual circuits are established and maintained by the service provider, allowing for efficient and flexible data transmission.Rate this question:
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- 15.
The physical leased line installed between the customers’ routers and a nearby Frame Relay switch is called
- A.
Trunk Link
- B.
Access Link
- C.
Data Link
- D.
Permanent Virtual Circuit
Correct Answer
B. Access LinkExplanation
The physical leased line installed between the customers' routers and a nearby Frame Relay switch is called an Access Link. This link provides the customers with access to the Frame Relay network, allowing them to connect their routers to the network and transmit data. The Access Link is responsible for carrying the data between the customer's premises and the Frame Relay switch, acting as the connection point for the customer's network and the wider network infrastructure.Rate this question:
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- 16.
Frame Relay “switches” frame based upon the ______ field located in the Frame Relay’s _______ (Choose 2)
- A.
DLCI
- B.
Trailer
- C.
Header
- D.
Address
- E.
LMI
- F.
Type
Correct Answer(s)
A. DLCI
C. HeaderExplanation
Frame Relay "switches" frame based upon the DLCI field located in the Frame Relay's header. The DLCI (Data Link Connection Identifier) is a unique identifier that is used to identify the virtual circuit between the sender and receiver in a Frame Relay network. The header contains important information about the frame, including the source and destination addresses, as well as the DLCI. By examining the DLCI field in the header, the Frame Relay switch can determine the appropriate path for forwarding the frame to its destination.Rate this question:
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- 17.
CIR or Committed Information Rate is
- A.
The bandwidth rate at which the customers are allow to transfer on the network
- B.
The minimum guarantee bandwidth that the customers will receive on a Frame Relay network
- C.
The effective bandwidth that the Frame Relay network will deliver at any given point
- D.
The variable bandwidth committed by the service provider during high traffic hour
Correct Answer
B. The minimum guarantee bandwidth that the customers will receive on a Frame Relay networkExplanation
The Frame Relay network can deliver more speed than the one you ordered and so there isn't an exact speed you will always have to attend to. However, the service provider will guarantee you a minimum speed you will always get, which is the CIR.Rate this question:
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