Computer Network Mcqs

Page No. 72

In RPC, while a server is processing the call, the client is blocked ________


aunless the client sends an asynchronous request to the server

✓


bunless the call processing is complete

✖


cfor the complete duration of the connection

✖


d unless the server is disconnected

✖


View Answer unless the client sends an asynchronous request to the server

An RPC (remote procedure call) is initiated by the _________


aserver

✖


bclient

✓


cclient after the sever

✖


da third party

✖


View Answer client

Which of the following is true of signature-based IDSes?


aThey alert administrators to deviations from “normal” traffic behavior

✖


bThey identify previously unknown attacks

✖


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

✖


d They scan network traffic or packets to identify matches with attack-definition files

✓


View Answer 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?


a Crossover error rate

✓


bFalse negative rate

✖


c False positive rate

✖


dBit error rate

✖


View Answer Crossover error rate

“Semantics-aware” signatures automatically generated by Nemean are based on traffic at which two layers?


aApplication layer and Transport layer

✖


bNetwork layer and Application layer

✖


cSession layer and Transport layer

✖


dApplication layer and Session layer

✓


View Answer Application layer and Session layer

When discussing IDS/IPS, what is a signature?


aAn electronic signature used to authenticate the identity of a user on the network

✖


bAttack-definition file

✓


cIt refers to “normal,” baseline network behavior

✖


d It is used to authorize the users on a network

✖


View Answer Attack-definition file

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?


aInspection of password files to detect inadvisable passwords

✖


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

✓


c Inspection of system to detect policy violations

✖


dInspection of configuration files to detect inadvisable settings

✖


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

At which two traffic layers do most commercial IDSes generate signatures?


aApplication layer and Network layer

✖


bNetwork layer and Session Layer

✖


c Transport layer and Application layer

✖


dTransport layer and Network layer

✓


View Answer Transport layer and Network layer

What is the purpose of a shadow honeypot?


aTo flag attacks against known vulnerabilities

✖


bTo help reduce false positives in a signature-based IDS

✖


cTo randomly check suspicious traffic identified by an anomaly detection system

✓


dTo enhance the accuracy of a traditional honeypot

✖


View Answer To randomly check suspicious traffic identified by an anomaly detection system

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?


aInside the firewall

✓


b Outside the firewall

✖


cBoth inside and outside the firewall

✖


dNeither inside the firewall nor outside the firewall.

✖


View Answer Inside the firewall

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