Alcatel-lucent Scalable IP Networks Exam A

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Alcatel-lucent Scalable IP Networks Exam A

Preparing for the Network Routing Specialist I (NRS I) Certification Exam (4A0-100)


Questions and Answers
  • 1. 
    1. The original network that ultimately became the Internet was called ______.  
    • A. 

      A. NSFNET

    • B. 

      B. ARPANET

    • C. 

      C. DoDnet

    • D. 

      D. DARPA

  • 2. 
    2. The primary organization behind the development of the original Internet was ______.  
    • A. 

      A. IBM

    • B. 

      B. Digital Equipment Corporation (DEC)

    • C. 

      C. Stanford University

    • D. 

      D. U.S. Department of Defense

  • 3. 
    3. Which of the following was not a primary design concern during the development of the original Internet?  
    • A. 

      A. Reliability

    • B. 

      B. Bandwidth

    • C. 

      C. Interoperability

    • D. 

      D. Support for diverse network mediums

  • 4. 
    4. Which of the following was not a reason TCP was a superior transport protocol to NCP?  
    • A. 

      A. Support for global addressing

    • B. 

      B. Support for end-to-end checksums

    • C. 

      C. Support for applications such as email

    • D. 

      D. Support for fragmentation and reassembly

  • 5. 
    5. Which of the following OSI layers is not paired with the correct implementation?    
    • A. 

      A. Layer 7—Email

    • B. 

      B. Layer 3—TCP

    • C. 

      C. Layer 4—UDP

    • D. 

      D. Layer 2—PPP

  • 6. 
    6. Part of the growth of the ARPANET was driven by the ability of anyone to create and disseminate information about potential protocols and applications in a particular kind of document. These documents are known as ______.  
    • A. 

      A. Requests For Information

    • B. 

      B. Protocol Revisions

    • C. 

      C. Requests For Comments

    • D. 

      D. Requests For Configurations

  • 7. 
    7. ISPs connect to each other at well-defined network locations to exchange information. These connection points are known as ______.  
    • A. 

      A. ISPs

    • B. 

      B. IXPs

    • C. 

      C. BGPs

    • D. 

      D. POPs

  • 8. 
    • A. 

      A. Sites at different tiers cannot communicate.

    • B. 

      B. Tier 3 providers don’t use TCP/IP.

    • C. 

      C. O nly Tier 1 providers provide content.

    • D. 

      D. A single provider could offer SLAs to each location.

  • 9. 
    9. Which of the following services would likely be offered by a content provider but not a service provider?  
    • A. 

      A. Standard dial-up service

    • B. 

      B. Live video streaming from sports events

    • C. 

      C. Email service

    • D. 

      D. Basic web services

  • 10. 
    10. Which of the following accurately describes the TCP protocol?
    • A. 

      A. Connectionless with no guarantee of delivery

    • B. 

      B. Connectionless with guarantee of delivery

    • C. 

      C. Connection-oriented with guarantee of delivery

    • D. 

      D. None of the above

  • 11. 
    11. O riginally the IP protocol functions were performed by ______.  
    • A. 

      A. Ethernet

    • B. 

      B. TCP

    • C. 

      C. NCP

    • D. 

      D. ALOHANET

  • 12. 
    12. When an HTTP packet needs to be forwarded over the Internet, which of the following accurately describes the order of the headers as they would be placed in front of each other in the packet (assume that the originating device is on an Ethernet network)?    
    • A. 

      A. HTTP, IP, TCP, Ethernet

    • B. 

      B. HTTP, TCP, IP, Ethernet

    • C. 

      C. HTTP, UDP, IP, Ethernet

    • D. 

      D. HTTP, IP, Ethernet

  • 13. 
    13. A router processing the packet described in Question 12 would need to examine and/or manipulate which headers?  
    • A. 

      A. Ethernet only

    • B. 

      B. IP only

    • C. 

      C.TCP and IP only

    • D. 

      D. IP and Ethernet only

  • 14. 
    14. What would a router processing the packet described in Question 12 do with the Layer 2 header of the incoming packet?  
    • A. 

      A. Remove the source Layer 2 address, add its own, and forward the packet.

    • B. 

      B. Remove the Layer 2 addresses and replace them with new addresses.

    • C. 

      C. Remove the entire Layer 2 header and create a new one based on the next-hop

    • D. 

      D. Leave the original Layer 2 header but forward the packet based on the destination

  • 15. 
    15. Most of the OSI-created protocols are no longer in use, although a few still provide some critically important functions. Which of the following describes an OSI protocol that is still in use?  
    • A. 

      A. O SPF

    • B. 

      B. LDP

    • C. 

      C. TP0

    • D. 

      D. IS-IS

  • 16. 
     Which of the following is not a product in the Alcatel-Lucent 7750 SR/7450 ESS family?
    • A. 

      A. SR-12

    • B. 

      B. ESS-7

    • C. 

      C. SR-6

    • D. 

      D. ESS-1

  • 17. 
    Which of the following statements is false regarding the Alcatel-Lucent 7450 ESS series?
    • A. 

      A. It supports multiple chassis types.

    • B. 

      B. It supports OSFP, IS-IS, RIP, and BGP.

    • C. 

      C. It is used primarily for Ethernet aggregation.

    • D. 

      D. It can be managed via a console port or a dedicated Ethernet port on the

  • 18. 
     Which of the following descriptions is correct?
    • A. 

      A. bof.cfg—7750/7450 configuration file

    • B. 

      B. cpm.tim—IOM image file

    • C. 

      C. config.cfg—Back-up configuration file

    • D. 

      D. boot.ldr—Bootstrap image file

  • 19. 
     Which of the following commands is not correctly described?
    • A. 

      A. shutdown—This command is used to disable an interface or protocol.

    • B. 

      B. exit all—Logs out of the Alcatel-Lucent 7750 SR/7450 ESS device.

    • C. 

      C. ?—Lists all commands in the current context.

    • D. 

      D. [TAB]—This command is used for assistance with command completion.

  • 20. 
     Which of the following is not a log stream type?
    • A. 

      A. Audit

    • B. 

      B. Change

    • C. 

      C. Main

    • D. 

      D. Security

  • 21. 
     Which of the following descriptions of hardware for the Alcatel-Lucent 7750 SR/7450 ESS is correct?
    • A. 

      A. IOMs plug into MDAs.

    • B. 

      B. MDAs plug into SFPs.

    • C. 

      C. SF/CPMs plug into IOMs.

    • D. 

      D. IOMs plug into the chassis.

  • 22. 
     What file contains the system bootstrap image?
    • A. 

      A. boot.cfg

    • B. 

      B. image.ldr

    • C. 

      C. boot.ldr

    • D. 

      D. bof.cfg

  • 23. 
     The SF/CPM card has its own Ethernet interface for out-of-band management. This interface has its own IP address and default route. Where is this information stored?  
    • A. 

      A. boot.ldf

    • B. 

      B. bof.cfg

    • C. 

      C. config.cfg

    • D. 

      D. cpm.tim

  • 24. 
     Which of the following correctly lists the order in which files are read by the Alcatel-Lucent 7750 SR/7450 ESS upon bootup?
    • A. 

      A. boot.ldr, bof.cfg, system image, config.cfg

    • B. 

      B. system image, boot.ldr, config.cfg, bof.cfg

    • C. 

      C. boot.ldr, system image, bof.cfg, config.cfg

    • D. 

      D. boot.ldr, bof.cfg, config.cfg, system image

  • 25. 
     During the boot process, an Alcatel-Lucent 7750 SR/7450 ESS checks to see if persistence is enabled. What is the purpose of persistence?
    • A. 

      A. To ensure that the system saves routing table information when it reboots

    • B. 

      B. To ensure that changes to the bof.cfg are saved

    • C. 

      C. To ensure synchronization with the 5620 SAM

    • D. 

      D. To ensure that config changes are stored in the config.cfg

  • 26. 
    What command would you use to enable an interface the first time you initialized an Alcatel-Lucent 7750 SR/7450 ESS?
    • A. 

      A. enable

    • B. 

      B. no shutdown

    • C. 

      C. interface enable

    • D. 

      D. interface on

  • 27. 
     Which of the following is the correct provisioning order you should follow when configuring an Alcatel-Lucent 7750 SR/7450 ESS for the first time?        
    • A. 

      A. IOM, port, MDA

    • B. 

      B. Port, MDA, IOM

    • C. 

      C. IOM, MDA, port

    • D. 

      D. MDA, port, IOM

  • 28. 
     Which of the following is false regarding the logging mechanisms in the Alcatel- Lucent 7750 SR/7450 ESS?
    • A. 

      A. Log-ids 99 and 100 are reserved for system usage.

    • B. 

      B. You must configure at least one input stream for a log-id.

    • C. 

      C. You must configure a filter for each log-id.

    • D. 

      D. You must configure the destination for the events from the log-id.

  • 29. 
     What command would you use to display the configuration of your Alcatel-Lucent 7750 SR/7450 ESS?
    • A. 

      A. show config

    • B. 

      B. admin display-config

    • C. 

      C. display config

    • D. 

      D. show admin config

  • 30. 
     Which of the following values is not stored in the bof.cfg?
    • A. 

      A. The location of the primary boot image

    • B. 

      B. The list of IOM cards in the chassis

    • C. 

      C. The persist value

    • D. 

      D. The location of the primary config file

  • 31. 
     Which of the following is not a data link layer (OSI Layer 2) protocol?  
    • A. 

      A. Ethernet

    • B. 

      B. ATM

    • C. 

      C. Cell-Relay

    • D. 

      D. PPP

  • 32. 
     Which of the following is not a function of PPP? .
    • A. 

      A. Provide support for multiple upper-layer protocols.

    • B. 

      B. Support the connection of multiple devices on a single link.

    • C. 

      C. Support authentication

    • D. 

      D. Support data integrity via a CRC on frame contents.

  • 33. 
    Which of the following ATM AAL types is associated with an incorrect description?
    • A. 

      A. AAL3/4—Connection-oriented service

    • B. 

      B. AAL5—Connectionless service

    • C. 

      C. AAL2—Variable bit rate traffic

    • D. 

      D. AAL1—High bit rate traffic

  • 34. 
     Which of the following technologies ensures that a unicast packet is visible only to the device with the specific destination address?
    • A. 

      A. Ethernet

    • B. 

      B. Switched Ethernet

    • C. 

      C. Satellite

    • D. 

      D. Wireless LAN

  • 35. 
    The advantage of using multicast packets instead of broadcast packets is:  
    • A. 

      A. Broadcasts are received by every host.

    • B. 

      B. Multicast is newer technology.

    • C. 

      C. Broadcasts are processed by every host.

    • D. 

      D. Multicast provides multiple addresses for flexibility.

  • 36. 
     A PPP frame has several fields that are not used, like addressing. Why do these fields exist in the frame?
    • A. 

      A. They are reserved for future use.

    • B. 

      B. They are legacy fields from older versions of PPP headers.

    • C. 

      C. PPP is based on the HDLC frame format.

    • D. 

      D. PPP can be adapted for use on multi-point networks and might need the fields.

  • 37. 
     ATM uses 53-byte cells, which is quite a bit smaller than the maximum Ethernet frame. What is the purpose of having such a small cell size?
    • A. 

      A. To support latency-sensitive applications like voice traffic

    • B. 

      B. To provide less overhead on ATM switches

    • C. 

      C. To support the use of multiple classes of service

    • D. 

      D. To provide the ability to do switching in hardware

  • 38. 
    What is the purpose of the ATM Adaptation Layer?
    • A. 

      A. It determines the amount of data in the cell.

    • B. 

      B. It maps data from upper-layer service classes to ATM cells.

    • C. 

      C. It adapts Ethernet frames to ATM cells.

    • D. 

      D. It wraps a header around the ATM cell.

  • 39. 
     What are the two main types of Ethernet frames?
    • A. 

      A. Thinnet and Thicknet

    • B. 

      B. 10baseT and 100baseT

    • C. 

      C. DIX Ethernet and Ethernet II

    • D. 

      D. 802.3 and Ethernet II

  • 40. 
     Which of the following values for the Ethertype/length fields indicates an 802.3 frame (numbers are in decimal)?
    • A. 

      A. 64

    • B. 

      B. 1540

    • C. 

      C. 2048

    • D. 

      D. 9000

  • 41. 
    The original Thicknet standard had a maximum cable length as well as a minimum distance for stations to tap into the cable. Based on the description of CSMA/CD, what is the most likely reason for these distance requirements?  
    • A. 

      A. A signal might be too weak to travel farther than the maximum distance.

    • B. 

      B. Every station on the wire had to be able to “detect” a collision in order to function properly.

    • C. 

      C. Too many taps in the cable would weaken the wire.

    • D. 

      D. Thicknet cable came in fixed lengths.

  • 42. 
    An Ethernet MAC address consists of ______.  
    • A. 

      A. A 4-byte number in four parts

    • B. 

      B. A 4-byte number in two parts

    • C. 

      C. A 6-byte number in two parts

    • D. 

      D. A 6-byte number in four parts

  • 43. 
     When an Ethernet station wants to transmit information, the process it follows is ______.
    • A. 

      A. Just start transmitting.

    • B. 

      B. Listen for other stations transmitting; if none, then begin transmitting.

    • C. 

      C. Transmit whenever it receives the token.

    • D. 

      D. Issue a transmit request, and transmit when given authorization to do so.

  • 44. 
    14. What happens when two or more Ethernet stations attempt to transmit at the same time?
    • A. 

      A. This is impossible on half-duplex.

    • B. 

      B. The signal results in a collision, the stations stop, and the stations all wait the same amount of time to retransmit.

    • C. 

      C. The signal results in a collision, and the stations retransmit based on a configured priority.

    • D. 

      D. The signal results in a collision, and the stations stop and retransmit after waiting a random amount of time.

  • 45. 
     Which of the following Ethernet standards is not matched correctly?
    • A. 

      A. 10 Mb Ethernet—Fiber or copper cable

    • B. 

      B. 100 Mb Ethernet—Fiber or copper cable

    • C. 

      C. 1 Gig Ethernet—Fiber cable only

    • D. 

      D. All of the above are correct.