Computer Networks MCQ

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• In EIGRP best path is known as the successor, where as backup path is known as __________
  ক

  Feasible successor

  খ

  Back-up route

  গ

  Default route

  ঘ

  There is no backup route in EIGRP
• EIGRP uses the ____________ algorithm for finding shortest path.
  ক

  SPF

  খ

  DUAL

  গ

  Linkstat

  ঘ

  Djikstra’s
• Administrative distance for external EIGRP route is _______
  ক

  90

  খ

  170

  গ

  110

  ঘ

  100
• For default gateway, which of following commands will you use on a Cisco router?
  ক

  IP default network

  খ

  IP default gateway

  গ

  IP default route

  ঘ

  Default network
• The EIGRP metric values include:
  ক

  Delay

  খ

  Bandwidth

  গ

  MTU

  ঘ

  All of the mentioned
• Administrative distance for internal EIGRP is ______
  ক

  90

  খ

  170

  গ

  110

  ঘ

  91
• EIGRP sends a hello message after every ___________ seconds.
  ক

  5 seconds (LAN), 60 seconds (WAN)

  খ

  5 seconds (LAN), 5 seconds (WAN)

  গ

  15s

  ঘ

  180s
• EIGRP can support ____________
  ক

  VLSM/subnetting

  খ

  Auto summary

  গ

  Unequal cast load balancing

  ঘ

  All of the mentioned
• EIGRP metric is ________
  ক

  K-values

  খ

  Bandwidth only

  গ

  Hop Count

  ঘ

  Delay only
• EIGRP is a routing protocol design by Cisco.
  ক

  True

  খ

  False
• The link necessarily begins and ends with this phase. During the ______ phase, the LCP automata will be in INITIAL or STARTING states.
  ক

  Link-termination phase

  খ

  Link establishment phase

  গ

  Authentication phase

  ঘ

  Link dead phase
• A family of network control protocols (NCPs) ____________
  ক

  Are a series of independently defined protocols that provide a dynamic

  খ

  Are a series of independently-defined protocols that encapsulate

  গ

  Are a series of independently defined protocols that provide transparent

  ঘ

  The same as NFS
• A Link Control Protocol (LCP) is used for ____________
  ক

  Establishing, configuring and testing the data-link connection

  খ

  Establishing and configuring different network-layer protocols

  গ

  Testing the different network-layer protocols

  ঘ

  Provides for multiplexing of different network-layer protocols
• The PPP encapsulation ____________
  ক

  Provides for multiplexing of different network-layer protocols

  খ

  Requires framing to indicate the beginning and end of the encapsulation

  গ

  Establishing, configuring and testing the data-link connection

  ঘ

  Provides interface for handling the capabilities of the connection/link on the network
• PPP consists of ________components
  ক

  Three (encapsulating, the Domain Name system)

  খ

  Three (encapsulating, a link control protocol, NCP)

  গ

  Two (a link control protocol, Simple Network Control protocol)

  ঘ

  One (Simple Network Control protocol)
• PPP provides the _______ layer in the TCP/IP suite.
  ক

  Link

  খ

  Network

  গ

  Transport

  ঘ

  Application
• The PPP protocol _________
  ক

  Is designed for simple links which transport packets between two peers

  খ

  Is one of the protocols for making an Internet connection over a phone line

  গ

  Is designed for simple links which transport packets between two peers and making an Internet connection over a phone line

  ঘ

  Is used for sharing bandwidth
• Which protocol does the PPP protocol provide for handling the capabilities of the connection/link on the network?
  ক

  LCP

  খ

  NCP

  গ

  Both LCP and NCP

  ঘ

  TCP
• Both HDLC and PPP are Data link layer protocols.
  ক

  True

  খ

  False
• Which of the following is true of signature-based IDSes?
  ক

  They alert administrators to deviations from “normal” traffic behavior

  খ

  They identify previously unknown attacks

  গ

  The technology is mature and reliable enough to use on production networks

  ঘ

  They scan network traffic or packets to identify matches with attack-definition files
• Which of the following is used to provide a baseline measure for comparison of IDSes?
  ক

  Crossover error rate

  খ

  False negative rate

  গ

  False positive rate

  ঘ

  Bit error rate
• “Semantics-aware” signatures automatically generated by Nemean are based on traffic at which two layers?
  ক

  Application layer and Transport layer

  খ

  Network layer and Application layer

  গ

  Session layer and Transport layer

  ঘ

  Application layer and Session layer
• IDS follows a two-step process consisting of a passive component and an active component. Which of the following is part of the active component?
  ক

  Inspection of password files to detect inadvisable passwords

  খ

  Mechanisms put in place to reenact known methods of attack and record system responses

  গ

  Inspection of system to detect policy violations

  ঘ

  Inspection of configuration files to detect inadvisable settings
• At which two traffic layers do most commercial IDSes generate signatures?
  ক

  Application layer and Network layer

  খ

  Network layer and Session Layer

  গ

  Transport layer and Application layer

  ঘ

  Transport layer and Network layer
• What is the purpose of a shadow honeypot?
  ক

  To flag attacks against known vulnerabilities

  খ

  To help reduce false positives in a signature-based IDS

  গ

  To randomly check suspicious traffic identified by an anomaly detection system

  ঘ

  To enhance the accuracy of a traditional honeypot
• One of the most obvious places to put an IDS sensor is near the firewall. Where exactly in relation to the firewall is the most productive placement?
  ক

  Inside the firewall

  খ

  Outside the firewall

  গ

  Both inside and outside the firewall

  ঘ

  Neither inside the firewall nor outside the firewall.
• A false positive can be defined as ________
  ক

  An alert that indicates nefarious activity on a system that, upon further inspection, turns out to represent legitimate network traffic or behavior

  খ

  An alert that indicates nefarious activity on a system that is not running on the network

  গ

  The lack of an alert for nefarious activity

  ঘ

  Both An alert that indicates nefarious activity on a system that, upon further inspection, turns out to represent legitimate network traffic or behavior and An alert that indicates nefarious activity on a system that is not running on the network
• Which of the following is an advantage of anomaly detection?
  ক

  Rules are easy to define

  খ

  Custom protocols can be easily analyzed

  গ

  The engine can scale as the rule set grows

  ঘ

  Malicious activity that falls within normal usage patterns is detected
• The local operating system on the server machine passes the incoming packets to the ___________
  ক

  server stub

  খ

  client stub

  গ

  client operating system

  ঘ

  client process
• RPC is a _________
  ক

  synchronous operation

  খ

  asynchronous operation

  গ

  time independent operation

  ঘ

  channel specific operation