EC-COUNCIL 312-38 Online Practice Questions and Exam Preparation

EC-COUNCIL 312-38 Online Questions & Answers

• Question 641:

  Which of the following protocols is used for inter-domain multicast routing?

  A. BGP
  B. RPC
  C. VoIP
  D. RADIUS
  A. BGP

• Question 642:

  Fill in the blank with the appropriate term.

  A is a translation device or service that is often controlled by a separate Media Gateway Controller, which provides the call control and signaling functionality.

  Media gateway

  Explanation/Reference:

  A Media gateway is a translation device or service that converts digital media streams between disparate telecommunications networks such as PSTN, SS7, Next Generation Networks (2G, 2.5G and 3G radio access networks) or PBX. Media gateways enable multimedia communications across Next Generation Networks over multiple transport protocols such as Asynchronous Transfer Mode (ATM) and Internet Protocol (IP). Because the media gateway connects different types of networks, one of its main functions is to convert between different transmission and coding techniques. Media streaming functions such as echo cancellation, DTMF, and tone sender are also located in the media gateway. Media gateways are often controlled by a separate Media Gateway Controller, which provides the call control and signaling functionality.

• Question 643:

  Which of the following is also known as stateful firewall?

  A. PIX firewall
  B. Stateless firewall
  C. DMZ D. Dynamic packet-filtering firewall
  D

• Question 644:

  Which of the following is a type of VPN that involves a single VPN gateway?

  A. Remote-access VPN
  B. Extranet-based VPN
  C. PPTP VPN
  D. Intranet-based VPN
  B. Extranet-based VPN

• Question 645:

  Which of the following is a digital telephone/telecommunication network that carries voice, data, and video over an existing telephone network infrastructure?

  A. PPP
  B. Frame relay
  C. ISDN
  D. X.25
  C. ISDN

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  Explanation/Reference:

  Integrated Services Digital Network (ISDN) is a digital telephone/telecommunication network that carries voice, data, and video over an existing telephone network infrastructure. It requires an ISDN modem at both the ends of a transmission. ISDN is designed to provide a single interface for hooking up a telephone, fax machine, computer, etc. ISDN has two levels of service, i.e., Basic Rate Interface (BRI) and Primary Rate Interface (PRI). Answer option A is incorrect. The Point-to-Point Protocol, or PPP, is a data link protocol commonly used to establish a direct connection between two networking nodes. It can provide connection authentication, transmission encryption privacy, and compression. PPP is commonly used as a data link layer protocol for connection over synchronous and asynchronous circuits, where it has largely superseded the older, non-standard Serial Line Internet Protocol (SLIP) and telephone company mandated standards (such as Link Access Protocol, Balanced (LAPB) in the X.25 protocol suite). PPP was designed to work with numerous network layer protocols, including Internet Protocol (IP), Novell's Internetwork Packet Exchange (IPX), NBF, and AppleTalk. Answer option D is incorrect. The X.25 protocol, adopted as a standard by the Consultative Committee for International Telegraph and Telephone (CCITT), is a commonly-used network protocol. The X.25 protocol allows computers on different public networks (such as CompuServe, Tymnet, or a TCP/IP network) to communicate through an intermediary computer at the network layer level. X.25's protocols correspond closely to the data-link and physical-layer protocols defined in the Open Systems Interconnection (OSI) communication model. Answer option B is incorrect. Frame relay is a telecommunication service designed for cost-efficient data transmission for intermittent traffic between local area networks (LANs) and between end-points in a wide area network (WAN). Frame relay puts data in a variable-size unit called a frame. It checks for lesser errors as compared to other traditional forms of packet switching and hence speeds up data transmission. When an error is detected in a frame, it is simply dropped. The end points are responsible for detecting and retransmitting dropped frames.

• Question 646:

  Which of the following attacks combines dictionary and brute force attacks?

  A. Replay attack
  B. Man-in-the-middle attack
  C. Hybrid attack
  D. Phishing attack
  C. Hybrid attack

• Question 647:

  Fill in the blank with the appropriate term.

  A is a term in computer terminology used for a trap that is set to detect, deflect, or in some manner counteract attempts at unauthorized use of information systems.

  honeypot

  Explanation/Reference:

  A honeypot is a term in computer terminology used for a trap that is set to detect, deflect, or in some manner counteract attempts at unauthorized use of information systems. Generally it consists of a computer, data, or a network site that appears to be part of a network, but is actually isolated, and monitored, and which seems to contain information or a resource of value to attackers.

• Question 648:

  An employee of a medical service company clicked a malicious link in an email sent by an attacker. Suddenly, employees of the company are not able to access billing information or client record as it is encrypted. The attacker asked the company to pay money for gaining access to their data. Which type of malware attack is described above?

  A. Logic bomb
  B. Rootkits
  C. Trojan
  D. Ransomware
  D. Ransomware

• Question 649:

  Which of the following features is used to generate spam on the Internet by spammers and worms?

  A. AutoComplete
  B. SMTP relay
  C. Server Message Block (SMB) signing
  D. AutoFill
  B. SMTP relay

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  Explanation/Reference:

  SMTP relay feature of e-mail servers allows them to forward e-mail to other e-mail servers. Unfortunately, this feature is exploited by spammers and worms to generate spam on the Internet.

• Question 650:

  Which of the following is true regarding any attack surface?

  A. Decrease in vulnerabilities decreases the attack surface
  B. Increase in vulnerabilities decreases the attack surface
  C. Decrease in risk exposures increases the attack surface
  D. Decrease in vulnerabilities increases the attack surface
  A. Decrease in vulnerabilities decreases the attack surface