WAN (Serial , Isdn, Fr, Ppp) - Practice Test

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  • 1/33 Questions

    PPP stands for ______________?

    • Point-to-Point Protocol
    • Packet-to-Packet Protocol
    • Point-to-Packet Protocol
    • None of the above
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WAN (Serial , Isdn, Fr, Ppp) - Practice Test - Quiz
About This Quiz

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?

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  • 2. 

    TDM WAN services offers and are usually traditional __________ circuits?

    • Fixed time slots; lease line circuits point-to-point

    • Sets up and clears calls between hosts; SVCs

    • Sets up and clears calls between hosts; SVCs

    • Sets up and clears calls between hosts; SVCs

    Correct Answer
    A. Fixed time slots; lease line circuits point-to-point
    Explanation
    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.

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  • 3. 

    ISDN stands for _____________?

    • I still don’t no and provides an integrated voice and data capability service to the customer

    • Integrated Services Digital Network and provides an integrated voice and data capability service to the customer premise.

    • Integrated Switched Digital Network and provides voice grade service to the customer.

    Correct Answer
    A. 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.

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  • 4. 

    The end node addressing for frame-relay is _____?

    • BECN

    • FECN

    • DLCI

    • ESI

    Correct Answer
    A. DLCI
    Explanation
    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.

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  • 5. 

    A frame relay switch makes decisions based on ______?

    • Application Layer addresses

    • Network Layer addresses

    • Data Link Layer address

    • None of the above

    Correct Answer
    A. Data Link Layer address
    Explanation
    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.

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  • 6. 

    What are the two types of authentication methods commonly used with PPP?

    • TACACS

    • SecurID

    • PAP and CHAP

    • RADIUS

    Correct Answer
    A. PAP and CHAP
    Explanation
    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.

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  • 7. 

    LMI is the ____?

    • Signaling interface between the router and the Frame Relay Switch

    • X.25 signaling format

    • ISDN signaling interface

    • V.35 connection to DECNet

    Correct Answer
    A. Signaling interface between the router and the Frame Relay Switch
    Explanation
    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.

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  • 8. 

    What are the two types of access a customer may subscribe?

    • BRI, PRI

    • BRI, DDR

    • DDR, PPP

    • BRI, Q.931

    Correct Answer
    A. BRI, PRI
    Explanation
    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.

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  • 9. 

    What are three basic types of WAN services that the CISCO router can use?

    • Call setup services, TDM, Packet Data services(X.25, FR and ATM)

    • Call setup services, TDM, FDM

    • SS7, FDM, STDM

    • 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.

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  • 10. 

    The Frame relay service address provided by the service provider is called a ______?

    • DLCI

    • X.121

    • SPID

    • Telephone number

    Correct Answer
    A. DLCI
    Explanation
    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.

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  • 11. 

    What the CISCO default encapsulation type on a serial interface?

    • NOVELL_ETHER

    • ARPA

    • HDLC

    • ETHERNET

    • PPP

    Correct Answer
    A. HDLC
    Explanation
    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.

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  • 12. 

    Frame Relay is __________?

    • Connection-oriented

    • Connectionless

    • Connectionless acknowledged

    • Connectionless acknowledged

    Correct Answer
    A. Connection-oriented
    Explanation
    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.

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  • 13. 

    Which of the following element in a frame is not used for congestion control?

    • Forward Explicit Congestion Notification

    • DLCI/DL-CORE Indication

    • Backward Explicit Congestion Notification

    • Discard Eligibility

    Correct Answer
    A. DLCI/DL-CORE Indication
    Explanation
    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.

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  • 14. 

    What are the two components on a WAN interface and which component is the router?

    • DTE and DCE, router is DTE

    • CPE and DTE, router is DTE

    • CPE and DCE, router is DCE

    • CPE and CO, router is CPE

    Correct Answer
    A. DTE and DCE, router is DTE
    Explanation
    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.

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  • 15. 

    With Frame-relay, the LMI type should agree between _____?

    • End devices

    • The end device and the switch

    • Switches

    • The end devices and the switches

    Correct Answer
    A. The end device and the switch
    Explanation
    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.

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  • 16. 

    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?

    • TA

    • NT1

    • S/T

    • TE1

    Correct Answer
    A. TA
    Explanation
    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.

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  • 17. 

    The Bearer channel speed is _______ and the D-Channel speed is ___________?

    • Bearer channels speed is 128K and D-channel is 64K.

    • Bearer channels speed is 64K and D-channel is 16K.

    • Bearer channels speed is 64K and D-channel is 64K.

    • None of above

    Correct Answer
    A. 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.

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  • 18. 

    PPP can be configured on which of the following types of interfaces?

    • Asynchronous serial

    • HSSI

    • ISDN

    • Synchronous serial

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    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.

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  • 19. 

    CIR refers to ________?

    • The minimum bandwidth available on a frame relay link

    • The maximum bandwidth available on a frame relay link

    • The average bandwidth available on a frame relay link

    • The guaranteed bandwidth available on a frame relay link

    Correct Answer
    A. The guaranteed bandwidth available on a frame relay link
    Explanation
    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.

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  • 20. 

    Is Cisco HDLC protocol interoperable with other vendors HDLC?

    • Yes. HDLC is a standard

    • No. Cisco HDLC is a proprietary implementation.

    • None of the above

    Correct Answer
    A. 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.

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  • 21. 

    In order to support a point-to-multipoint configuration, a Cisco router interface must be configured manually with _______?

    • Sub-interfaces

    • MAC addresses

    • DLCIs

    • None of the above

    Correct Answer
    A. Sub-interfaces
    Explanation
    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.

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  • 22. 

    What are the two FR encapsulation types supported within the CISCO IOS ?

    • CISCO, IETF

    • CISCO, ANSI

    • ANSI, IETF

    • None of the above

    Correct Answer
    A. CISCO, IETF
    Explanation
    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.

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  • 23. 

    What are the three LMI types that are supported within the CISCO IOS?

    • CISCO, ANSI, Q931

    • CISCO, ANSI, IETF

    • CISCO, ANSI, Q921

    • CISCO, ANSI, Q933a

    Correct Answer
    A. CISCO, ANSI, Q933a
    Explanation
    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.

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  • 24. 

    What is negotiated during the NCP negotiation phases?

    • Window size

    • Inverse ARP

    • The layer 3 protocol

    • Flow control mechanism

    Correct Answer
    A. The layer 3 protocol
    Explanation
    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.

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  • 25. 

    When configuring a frame relay static route, you must specify _____?

    • The destination layer 3 address and local DLCI

    • The destination layer 3 address and destination DLCI

    • The local layer 3 address and local DLCI

    • Any of the above

    Correct Answer
    A. The destination layer 3 address and local DLCI
    Explanation
    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.

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  • 26. 

    With Frame-relay, the encapsulation type should agree between _____?

    • End devices

    • The end device and the switch

    • Switches

    • The end devices and the switches

    Correct Answer
    A. The end device and the switch
    Explanation
    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.

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  • 27. 

    During LCP negotiations what parameters are negiotated?

    • Authentication

    • Compression

    • Error Detection

    • Multilink

    • None of above

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    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.

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  • 28. 

    What is the top speed for FR connections is ________?

    • 45Mbps

    • 10Mbps

    • 56Kbps

    • 64Kbps

    Correct Answer
    A. 45Mbps
    Explanation
    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.

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  • 29. 

    The ISDN standard is organized into three groups.  What are the groups and what does each groups specify?

    • E, I and Q Series. E-Addressing scheme;I-Concepts and Terminology;Q-Signalling standards.

    • S/T, U, and I Series. S/T – Interfaces specification; U-Users interface; I-Concepts and Terminology

    • 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.

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  • 30. 

    Frame Relay networks are considered to be ____?

    • Non-broadcast

    • Broadcast

    • Multicast

    • Point-to-point

    Correct Answer
    A. Non-broadcast
    Explanation
    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.

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  • 31. 

    What is a common standard found at the physical level standard for X.25?

    • RS-232

    • RS-449

    • X.21 bis

    • X.25

    Correct Answer
    A. X.21 bis
    Explanation
    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.

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  • 32. 

    If you are connecting an ISDN circuit into a BRI port, what kind of device must you connect to the BRI port?

    • None. You have a native ISDN interface.

    • TE1.

    • TA

    • NT1

    Correct Answer
    A. None. You have a native ISDN interface.
  • 33. 

    The DLCI for frame relay is guaranteed to be unique _____?

    • Across the frame relay cloud

    • Across a providers frame relay network

    • Across the router’s interface

    • Across a frame relay switch’s interfaces

    • None of the above

    Correct Answer
    A. None of the above
    Explanation
    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.

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  • Current Version
  • Mar 18, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 28, 2011
    Quiz Created by
    Apalani

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