WAN (Serial , Isdn, Fr, Ppp) - Practice Test
A WAN – or wide area network – is a telecommunications or computer network that can extend over a large geographical distance, as opposed to a local area network which doesn’t stretch nearly as far. What do you know about them?
Questions and Answers
- 1.
What are three basic types of WAN services that the CISCO router can use?
- A.
Call setup services, TDM, Packet Data services(X.25, FR and ATM)
- B.
Call setup services, TDM, FDM
- C.
SS7, FDM, STDM
- D.
None of above
Correct Answer
A. Call setup services, TDM, Packet Data services(X.25, FR and ATM)Explanation
The correct answer is Call setup services, TDM, Packet Data services (X.25, FR and ATM). Call setup services are used to establish connections between devices in a WAN. TDM (Time Division Multiplexing) is a method of transmitting multiple signals simultaneously over a single communication link. Packet Data services, such as X.25, FR (Frame Relay), and ATM (Asynchronous Transfer Mode), are protocols used for transmitting data packets over a network. These three types of WAN services are commonly used by CISCO routers for communication purposes.Rate this question:
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- 2.
TDM WAN services offers and are usually traditional __________ circuits?
- A.
Fixed time slots; lease line circuits point-to-point
- B.
Sets up and clears calls between hosts; SVCs
- C.
Sets up and clears calls between hosts; SVCs
- D.
Sets up and clears calls between hosts; SVCs
Correct Answer
A. Fixed time slots; lease line circuits point-to-pointExplanation
TDM (Time Division Multiplexing) WAN services offer traditional fixed time slots and lease line circuits point-to-point. This means that the available bandwidth is divided into fixed time slots, and each slot is allocated to a specific connection. This allows for efficient and predictable transmission of data. Additionally, lease line circuits provide dedicated connections between two points, ensuring a reliable and secure connection.Rate this question:
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- 3.
What are the two components on a WAN interface and which component is the router?
- A.
DTE and DCE, router is DTE
- B.
CPE and DTE, router is DTE
- C.
CPE and DCE, router is DCE
- D.
CPE and CO, router is CPE
Correct Answer
A. DTE and DCE, router is DTEExplanation
A WAN interface typically consists of two components: DTE (Data Terminal Equipment) and DCE (Data Circuit-terminating Equipment). The DTE is responsible for generating and receiving data on the network, while the DCE provides the physical connection to the network. In this scenario, the router is functioning as the DTE component, as it is responsible for generating and receiving data on the WAN interface.Rate this question:
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- 4.
What the CISCO default encapsulation type on a serial interface?
- A.
NOVELL_ETHER
- B.
ARPA
- C.
HDLC
- D.
ETHERNET
- E.
PPP
Correct Answer
C. HDLCExplanation
HDLC (High-Level Data Link Control) is a default encapsulation type used by Cisco on serial interfaces. HDLC is a synchronous data link layer protocol that provides error detection and flow control. It is widely used in point-to-point connections and is the default encapsulation type for Cisco serial interfaces unless otherwise specified. HDLC is a reliable and efficient protocol that ensures data integrity during transmission.Rate this question:
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- 5.
Is Cisco HDLC protocol interoperable with other vendors HDLC?
- A.
Yes. HDLC is a standard
- B.
No. Cisco HDLC is a proprietary implementation.
- C.
None of the above
Correct Answer
B. No. Cisco HDLC is a proprietary implementation.Explanation
Cisco HDLC is not interoperable with other vendors HDLC because it is a proprietary implementation. This means that it is specific to Cisco devices and may not work with devices from other vendors that use the standard HDLC protocol.Rate this question:
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- 6.
What is a common standard found at the physical level standard for X.25?
- A.
RS-232
- B.
RS-449
- C.
X.21 bis
- D.
X.25
Correct Answer
C. X.21 bisExplanation
X.21 bis is a common standard found at the physical level standard for X.25. X.21 bis is a physical interface standard that defines the electrical, mechanical, and functional characteristics for connecting data terminal equipment (DTE) to data circuit-terminating equipment (DCE) in X.25 networks. It specifies the physical connectors, pin assignments, and electrical signaling requirements for the transmission of data over the X.25 network. RS-232 and RS-449 are also physical interface standards, but they are not specifically associated with X.25. X.25 is the higher-level protocol that governs the packet-switched network and provides error correction and flow control mechanisms.Rate this question:
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- 7.
ISDN stands for _____________?
- A.
I still don’t no and provides an integrated voice and data capability service to the customer
- B.
Integrated Services Digital Network and provides an integrated voice and data capability service to the customer premise.
- C.
Integrated Switched Digital Network and provides voice grade service to the customer.
Correct Answer
B. Integrated Services Digital Network and provides an integrated voice and data capability service to the customer premise.Explanation
ISDN stands for Integrated Services Digital Network. It is a telecommunications network that provides an integrated voice and data capability service to the customer premise.Rate this question:
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- 8.
The Bearer channel speed is _______ and the D-Channel speed is ___________?
- A.
Bearer channels speed is 128K and D-channel is 64K.
- B.
Bearer channels speed is 64K and D-channel is 16K.
- C.
Bearer channels speed is 64K and D-channel is 64K.
- D.
None of above
Correct Answer
B. Bearer channels speed is 64K and D-channel is 16K.Explanation
The correct answer is that the bearer channel speed is 64K and the D-channel speed is 16K. This means that the bearer channel, which carries the voice or data traffic, has a speed of 64Kbps (kilobits per second), while the D-channel, which is responsible for signaling and control information, has a speed of 16Kbps. This division of speeds allows for efficient communication and allocation of resources in the network.Rate this question:
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- 9.
The ISDN standard is organized into three groups. What are the groups and what does each groups specify?
- A.
E, I and Q Series. E-Addressing scheme;I-Concepts and Terminology;Q-Signalling standards.
- B.
S/T, U, and I Series. S/T – Interfaces specification; U-Users interface; I-Concepts and Terminology
- C.
TA, S/T, and U Series. TA – Terminal interface; S/T – Interface specification;U-Users interface.
Correct Answer
A. E, I and Q Series. E-Addressing scheme;I-Concepts and Terminology;Q-Signalling standards.Explanation
The ISDN standard is organized into three groups: E, I, and Q Series. The E Series specifies the addressing scheme used in ISDN. The I Series defines the concepts and terminology used in ISDN. The Q Series specifies the signaling standards used in ISDN.Rate this question:
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- 10.
What are the two types of access a customer may subscribe?
- A.
BRI, PRI
- B.
BRI, DDR
- C.
DDR, PPP
- D.
BRI, Q.931
Correct Answer
A. BRI, PRIExplanation
BRI and PRI are the two types of access that a customer may subscribe to. BRI stands for Basic Rate Interface, which is an ISDN (Integrated Services Digital Network) service that provides two B channels for voice and data transmission, and one D channel for signaling. PRI stands for Primary Rate Interface, which is also an ISDN service but with a higher capacity, providing 23 B channels and one D channel for signaling. These two types of access offer different levels of capacity and functionality for customers to choose from.Rate this question:
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- 11.
If you are connecting an ISDN circuit to your router into a Series interface, what kind of device must you connect into the serial port?
- A.
TA
- B.
NT1
- C.
S/T
- D.
TE1
Correct Answer
A. TAExplanation
In order to connect an ISDN circuit to a router with a Series interface, you must connect a Terminal Adapter (TA) into the serial port. The TA serves as an intermediary device that converts the ISDN signal into a format that can be understood by the router. This allows the router to communicate with the ISDN network and establish a connection.Rate this question:
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- 12.
If you are connecting an ISDN circuit into a BRI port, what kind of device must you connect to the BRI port?
- A.
None. You have a native ISDN interface.
- B.
TE1.
- C.
TA
- D.
NT1
Correct Answer
A. None. You have a native ISDN interface. -
- 13.
Frame Relay is __________?
- A.
Connection-oriented
- B.
Connectionless
- C.
Connectionless acknowledged
- D.
Connectionless acknowledged
Correct Answer
A. Connection-orientedExplanation
Frame Relay is a connection-oriented networking protocol. This means that before data can be transmitted, a virtual circuit must be established between the sender and receiver. This circuit remains active for the duration of the communication session, ensuring that all data packets follow the same path and are delivered in the correct order. This connection-oriented approach provides reliable and predictable data delivery, making it suitable for applications that require consistent performance, such as voice and video transmission.Rate this question:
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- 14.
What are the two FR encapsulation types supported within the CISCO IOS ?
- A.
CISCO, IETF
- B.
CISCO, ANSI
- C.
ANSI, IETF
- D.
None of the above
Correct Answer
A. CISCO, IETFExplanation
The two FR encapsulation types supported within the CISCO IOS are CISCO and IETF. This means that the CISCO IOS supports both the CISCO proprietary encapsulation as well as the standard IETF encapsulation for Frame Relay. The CISCO encapsulation is specific to CISCO devices and may offer additional features or functionality, while the IETF encapsulation is a standardized method that can be used with any vendor's equipment.Rate this question:
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- 15.
What are the three LMI types that are supported within the CISCO IOS?
- A.
CISCO, ANSI, Q931
- B.
CISCO, ANSI, IETF
- C.
CISCO, ANSI, Q921
- D.
CISCO, ANSI, Q933a
Correct Answer
D. CISCO, ANSI, Q933aExplanation
The answer CISCO, ANSI, Q933a is correct because these are the three LMI (Local Management Interface) types that are supported within the CISCO IOS (Internetwork Operating System). CISCO is the default LMI type used by CISCO routers, ANSI is the LMI type used by non-CISCO routers, and Q933a is an ITU-T standard LMI type used in ISDN (Integrated Services Digital Network) networks.Rate this question:
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- 16.
What is the top speed for FR connections is ________?
- A.
45Mbps
- B.
10Mbps
- C.
56Kbps
- D.
64Kbps
Correct Answer
A. 45MbpsExplanation
The top speed for FR (Frame Relay) connections is 45Mbps. This means that the maximum data transfer rate for FR connections is 45 Megabits per second.Rate this question:
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- 17.
Frame Relay networks are considered to be ____?
- A.
Non-broadcast
- B.
Broadcast
- C.
Multicast
- D.
Point-to-point
Correct Answer
A. Non-broadcastExplanation
Frame Relay networks are considered to be non-broadcast because they do not support the transmission of broadcast messages. In a non-broadcast network, data is sent from one point to another in a unidirectional manner, without being broadcasted to multiple destinations. Frame Relay networks operate on a point-to-point basis, where data is transmitted between specific endpoints, making it an efficient and reliable option for point-to-point communication.Rate this question:
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- 18.
With Frame-relay, the encapsulation type should agree between _____?
- A.
End devices
- B.
The end device and the switch
- C.
Switches
- D.
The end devices and the switches
Correct Answer
B. The end device and the switchExplanation
In a Frame-relay network, the encapsulation type should agree between the end device and the switch. This means that both the end device and the switch should use the same encapsulation type in order to communicate effectively. If the encapsulation type does not match, there may be issues with data transmission and connectivity between the end device and the switch. Therefore, it is important for the end device and the switch to have compatible encapsulation types in order to ensure proper communication in a Frame-relay network.Rate this question:
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- 19.
With Frame-relay, the LMI type should agree between _____?
- A.
End devices
- B.
The end device and the switch
- C.
Switches
- D.
The end devices and the switches
Correct Answer
B. The end device and the switchExplanation
Frame-relay is a protocol used for communication between end devices and switches in a network. In order for the communication to be successful, the LMI (Local Management Interface) type should be agreed upon between the end device and the switch. This ensures that both devices understand and can interpret the LMI messages exchanged during the frame-relay communication.Rate this question:
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- 20.
A frame relay switch makes decisions based on ______?
- A.
Application Layer addresses
- B.
Network Layer addresses
- C.
Data Link Layer address
- D.
None of the above
Correct Answer
C. Data Link Layer addressExplanation
A frame relay switch makes decisions based on Data Link Layer addresses. Frame relay is a data link layer protocol that operates at the second layer of the OSI model. It uses Data Link Layer addresses to determine the destination of the data packets and make routing decisions. Application Layer addresses and Network Layer addresses are not relevant in frame relay switching.Rate this question:
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- 21.
CIR refers to ________?
- A.
The minimum bandwidth available on a frame relay link
- B.
The maximum bandwidth available on a frame relay link
- C.
The average bandwidth available on a frame relay link
- D.
The guaranteed bandwidth available on a frame relay link
Correct Answer
D. The guaranteed bandwidth available on a frame relay linkExplanation
CIR stands for Committed Information Rate. It refers to the guaranteed bandwidth that is available on a frame relay link. This means that the network provider ensures that a certain amount of bandwidth will always be available for the transmission of data on the frame relay link.Rate this question:
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- 22.
The end node addressing for frame-relay is _____?
- A.
BECN
- B.
FECN
- C.
DLCI
- D.
ESI
Correct Answer
C. DLCIExplanation
DLCI stands for Data Link Connection Identifier. It is a unique identifier used in frame-relay networks to identify the virtual circuit between the local and remote endpoints. DLCI is used for addressing the end nodes in a frame-relay network. BECN stands for Backward Explicit Congestion Notification, FECN stands for Forward Explicit Congestion Notification, and ESI stands for Ethernet Service Instance. These options are not related to the addressing of end nodes in frame-relay networks.Rate this question:
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- 23.
The DLCI for frame relay is guaranteed to be unique _____?
- A.
Across the frame relay cloud
- B.
Across a providers frame relay network
- C.
Across the router’s interface
- D.
Across a frame relay switch’s interfaces
- E.
None of the above
Correct Answer
E. None of the aboveExplanation
The DLCI (Data Link Connection Identifier) for frame relay is not guaranteed to be unique across any specific entity mentioned in the options. The uniqueness of DLCI is determined by the combination of the local router and the remote router. Therefore, the correct answer is "none of the above" as none of the options accurately describe the uniqueness of DLCI.Rate this question:
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- 24.
The Frame relay service address provided by the service provider is called a ______?
- A.
DLCI
- B.
X.121
- C.
SPID
- D.
Telephone number
Correct Answer
A. DLCIExplanation
The correct answer is DLCI. DLCI stands for Data Link Connection Identifier, which is a unique identifier assigned by the service provider to each virtual circuit in a Frame Relay network. It is used to distinguish between different connections and route data packets to the correct destination. Therefore, the Frame relay service address provided by the service provider is called a DLCI.Rate this question:
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- 25.
When configuring a frame relay static route, you must specify _____?
- A.
The destination layer 3 address and local DLCI
- B.
The destination layer 3 address and destination DLCI
- C.
The local layer 3 address and local DLCI
- D.
Any of the above
Correct Answer
A. The destination layer 3 address and local DLCIExplanation
When configuring a frame relay static route, you must specify the destination layer 3 address and local DLCI. This is because the destination layer 3 address is needed to identify the destination network or host to which the route should be directed. The local DLCI (Data Link Connection Identifier) is required to establish the logical connection between the local router and the frame relay network. By specifying both the destination layer 3 address and local DLCI, the router can correctly forward the traffic to the intended destination over the frame relay network.Rate this question:
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- 26.
LMI is the ____?
- A.
Signaling interface between the router and the Frame Relay Switch
- B.
X.25 signaling format
- C.
ISDN signaling interface
- D.
V.35 connection to DECNet
Correct Answer
A. Signaling interface between the router and the Frame Relay SwitchExplanation
LMI stands for Local Management Interface. It is a signaling interface between the router and the Frame Relay Switch. LMI is responsible for exchanging control information and managing the connection between the router and the Frame Relay network. It ensures the proper functioning and maintenance of the Frame Relay connection by monitoring the status of the link and reporting any errors or issues to the router. LMI also helps in the exchange of routing information and keeps the router updated about the network topology.Rate this question:
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- 27.
In order to support a point-to-multipoint configuration, a Cisco router interface must be configured manually with _______?
- A.
Sub-interfaces
- B.
MAC addresses
- C.
DLCIs
- D.
None of the above
Correct Answer
A. Sub-interfacesExplanation
In order to support a point-to-multipoint configuration, a Cisco router interface must be configured manually with sub-interfaces. Sub-interfaces allow a single physical interface to be divided into multiple logical interfaces, each with its own unique network address. This enables the router to communicate with multiple devices using different IP addresses on the same physical interface. By configuring sub-interfaces, the router can effectively support a point-to-multipoint configuration and facilitate communication between multiple devices.Rate this question:
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- 28.
Which of the following element in a frame is not used for congestion control?
- A.
Forward Explicit Congestion Notification
- B.
DLCI/DL-CORE Indication
- C.
Backward Explicit Congestion Notification
- D.
Discard Eligibility
Correct Answer
B. DLCI/DL-CORE IndicationExplanation
The correct answer is DLCI/DL-CORE Indication. DLCI/DL-CORE Indication is not used for congestion control in a frame. DLCI (Data Link Connection Identifier) is a number that identifies a specific virtual circuit within a Frame Relay network, and DL-CORE (Data Link - Connection Oriented Routing Environment) is a protocol used in ATM networks. These elements are used for routing and identifying connections, not for congestion control.Rate this question:
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- 29.
PPP stands for ______________?
- A.
Point-to-Point Protocol
- B.
Packet-to-Packet Protocol
- C.
Point-to-Packet Protocol
- D.
None of the above
Correct Answer
A. Point-to-Point ProtocolExplanation
PPP stands for Point-to-Point Protocol. This protocol is used for establishing a direct connection between two network nodes, typically over a serial interface. It is commonly used in dial-up connections and allows for the transmission of data packets between the two nodes. The other options, Packet-to-Packet Protocol and Point-to-Packet Protocol, are not correct as they do not accurately represent the acronym PPP.Rate this question:
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- 30.
PPP can be configured on which of the following types of interfaces?
- A.
Asynchronous serial
- B.
HSSI
- C.
ISDN
- D.
Synchronous serial
- E.
All of the above
Correct Answer
E. All of the aboveExplanation
PPP (Point-to-Point Protocol) can be configured on all of the mentioned types of interfaces, including asynchronous serial, HSSI, ISDN, and synchronous serial. PPP is a data link layer protocol commonly used for establishing a direct connection between two nodes in a network. It provides a secure and reliable way to transmit data over various types of physical connections. By supporting multiple interface types, PPP offers flexibility and compatibility with different network setups and technologies.Rate this question:
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- 31.
During LCP negotiations what parameters are negiotated?
- A.
Authentication
- B.
Compression
- C.
Error Detection
- D.
Multilink
- E.
None of above
- F.
All of the above
Correct Answer
F. All of the aboveExplanation
During LCP negotiations, all of the above parameters are negotiated. This means that authentication, compression, error detection, and multilink are all negotiated between the two devices. The negotiation process allows the devices to agree on the specific settings and options for each of these parameters, ensuring that both devices are able to communicate effectively and efficiently.Rate this question:
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- 32.
What is negotiated during the NCP negotiation phases?
- A.
Window size
- B.
Inverse ARP
- C.
The layer 3 protocol
- D.
Flow control mechanism
Correct Answer
C. The layer 3 protocolExplanation
During the NCP (Network Control Protocol) negotiation phases, the layer 3 protocol is negotiated. NCP is responsible for establishing and configuring network layer protocols in a communication session. This negotiation process allows both ends of the communication to agree on which layer 3 protocol will be used for transmitting data packets. The layer 3 protocol determines how data is routed and delivered across different networks, ensuring proper communication between devices.Rate this question:
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- 33.
What are the two types of authentication methods commonly used with PPP?
- A.
TACACS
- B.
SecurID
- C.
PAP and CHAP
- D.
RADIUS
Correct Answer
C. PAP and CHAPExplanation
PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) are the two types of authentication methods commonly used with PPP (Point-to-Point Protocol). PAP is a simple authentication method where the client sends its username and password in clear text to the server for verification. CHAP, on the other hand, is a more secure method where the server challenges the client with a random value, and the client responds with a hashed value of the challenge, ensuring the confidentiality of the password. These authentication methods help ensure secure communication between PPP endpoints.Rate this question:
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Mar 18, 2023Quiz Edited by
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Feb 28, 2011Quiz Created by
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