EC-COUNCIL EC-COUNCIL Certifications 312-38 Questions & Answers

• Question 581:

  Fill in the blank with the appropriate term.

  A is a physical or logical subnetwork that contains and exposes external services of an organization to a larger network.

  Correct Answer: demilitarized zone

  A demilitarized zone (DMZ) is a physical or logical subnetwork that contains and exposes external services of an organization to a larger network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization's Local Area Network (LAN); an external attacker only has access to equipment in the DMZ, rather than the whole of the network. Hosts in the DMZ have limited connectivity to specific hosts in the internal network, though communication with other hosts in the DMZ and to the external network is allowed. This allows hosts in the DMZ to provide services to both the internal and external networks, while an intervening firewall controls the traffic between the DMZ servers and the internal network clients. In a DMZ configuration, most computers on the LAN run behind a firewall connected to a public network such as the Internet.

• Question 582:

  Fill in the blank with the appropriate term. management is an area of systems management that involves acquiring, testing, and installing multiple patches (code changes) to an administered computer system.

  Correct Answer: Patch

  Patch management is an area of systems management that involves acquiring, testing, and installing multiple patches (code changes) to an administered computer system. Patch management includes the following tasks: Maintaining current knowledge of available patches Deciding what patches are appropriate for particular systems Ensuring that patches are installed properly Testing systems after installation, and documenting all associated procedures, such as specific configurations required A number of products are available to automate patch management tasks, including RingMaster's Automated Patch Management, PatchLink Update, and Gibraltar's Everguard.

• Question 583:

  Fill in the blank with the appropriate term.

  A gateway is a type of network gateway that provides the added capability to control devices across the Internet.

  Correct Answer: home automation

  A home automation gateway is a type of network gateway that provides the added capability to control devices across the Internet. Most gateways plug in to the home broadband router (and a wall outlet for power). When connected to a router that has Internet connectivity, the automation gateway helps in enabling computers and Web-enabled phones to remotely access automation devices at home.

• Question 584:

  Fill in the blank with the appropriate term. A is a block of data that a Web server stores on the client computer.

  Correct Answer: cookie

  Cookie is a block of data, which a Web server stores on the client computer. If no expiration date is set for the cookie, it expires when the browser closes. If the expiration date is set for a future date, the cookie will be stored on the client's disk after the session ends. If the expiration date is set for a past date, the cookie is deleted.

• Question 585:

  Fill in the blank with the appropriate term. The model is a description framework for computer network protocols and is sometimes called the Internet Model or the DoD Model.

  Correct Answer: TCP/IP

  The TCP/IP model is a description framework for computer network protocols. It describes a set of general design guidelines and implementations of specific networking protocols to enable computers to communicate over a network. TCP/IP provides end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination. Protocols exist for a variety of different types of communication services between computers. The TCP/ IP Model is sometimes called the Internet Model or the DoD Model. The TCP/IP model has four unique layers as shown in the image. This layer architecture is often compared with the seven-layer OSI Reference Model. The TCP/IP model and related protocols are maintained by the Internet Engineering Task Force (IETF).

  

• Question 586:

  Fill in the blank with the appropriate term. is a method for monitoring the e-mail delivery to the intended recipient.

  Correct Answer: Email tracking

  Email tracking is a method for monitoring the e-mail delivery to the intended recipient. Most tracking technologies utilize some form of digitally time-stamped record to reveal the exact time and date at which e-mail was received or opened, as well the IP address of the recipient. When a user uses such tools to send an e-mail, forward an e-mail, reply to an e-mail, or modify an e-mail, the resulting actions and tracks of the original e-mail are logged. The sender is notified of all actions performed on the tracked e-mail by an automatically generated e-mail. eMailTracker Pro and MailTracking.com are the tools that can be used to perform email tracking.

• Question 587:

  Fill in the blank with the appropriate term. In the method, a device or computer that transmits data needs to first listen to the channel for an amount of time to check for any activity on the channel.

  Correct Answer: CSMA/CA

  Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) is an access method used by wireless networks (IEEE 802.11). In this method, a device or computer that transmits data needs to first listen to the channel for an amount of time to check for any activity on the channel. If the channel is sensed as idle, the device is allowed to transmit data. If the channel is busy, the device postpones its transmission. Once the channel is clear, the device sends a signal telling all other devices not to transmit data, and then sends its packets. In Ethernet (IEEE 802.3) networks that use CSMA/CD, the device or computer continues to wait for a time and checks if the channel is still free. If the channel is free, the device transmits packets and waits for an acknowledgment signal indicating that the packets were received.

• Question 588:

  Fill in the blank with the appropriate term. is an open wireless technology standard for exchanging data over short distances from fixed and mobile devices.

  Correct Answer: Bluetooth

  Bluetooth is an open wireless technology standard for exchanging data over short distances from fixed and mobile devices,

  creating personal area networks with high levels of security. Created by telecoms vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of

  synchronization. Today Bluetooth is managed by the Bluetooth Special Interest Group.

• Question 589:

  Fill in the blank with the appropriate term. In computing, is a class of data storage devices that read their data in sequence.

  Correct Answer: SAM

  In computing, sequential access memory (SAM) is a class of data storage devices that read their data in sequence. This is in contrast to random access memory (RAM) where data can be accessed in any order. Sequential access devices are usually a form of magnetic memory. While sequential access memory is read in sequence, access can still be made to arbitrary locations by "seeking" to the requested location. Magnetic sequential access memory is typically used for secondary storage in general-purpose computers due to their higher density at lower cost compared to RAM, as well as resistance to wear and non-volatility. Examples of SAM devices include hard disks, CD-ROMs, and magnetic tapes.

• Question 590:

  Fill in the blank with the appropriate term. The protocol is a feature of packet-based data transmission protocols. It is used to keep a record of the frame sequences sent and their respective acknowledgements received by both the users.

  Correct Answer: Sliding Window

  The Sliding Window protocol is a feature of packet-based data transmission protocols. It is used in the data link layer (OSI model) as well as in TCP (transport layer of the OSI model). It is used to keep a record of the frame sequences sent, and their respective acknowledgements received, by both the users. Its additional feature over a simpler protocol is that can allow multiple packets to be "in transmission" simultaneously, rather than waiting for each packet to be acknowledged before sending the next.In transmit flow control, sliding window is a variable-duration window that allows a sender to transmit a specified number of data units before an acknowledgment is received or before a specified event occurs.An example of a sliding window is one in which, after the sender fails to receive an acknowledgment for the first transmitted frame, the sender "slides" the window, i.e., resets the window, and sends a second frame. This process is repeated for the specified number of times before the sender interrupts transmission. Sliding window is sometimes called acknowledgment delay period.