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QUESTION NO: 1
Which of the following techniques allows multiple computers to share one or more IP addresses?
A. NAT
B. WINS
C. DNS
D. DHCP
Answer: A
Explanation:
Network address translation (NAT) is a technique that allows multiple computers to share one or more IP addresses. It is configured at a server between a private network and the Internet. It allows the computers in the private network to share a global, ISP assigned address. It modifies the headers of packets traversing the server. For the packets outbound to the Internet, it translates the source addresses from private to public, whereas for the packets inbound from the Internet, it translates the destination addresses from public to private. Answer option D is incorrect. Domain Name System
(DNS) is a hierarchical naming system for computers, services, and resources connected to the
Internet or a private network. It is used to translate domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide. In other words, the Domain Name System is a system that serves as the "phone book" for the Internet by translating human-friendly computer hostnames into
IP addresses. Answer option C is incorrect. DHCP stands for Dynamic Host Configuration Protocol. It is a computer networking protocol that lets network administrators centrally manage and automate the assignment of Internet Protocol (IP) addresses in an organization's network. Using the Internet
Protocol, each machine that can connect to the Internet needs a unique IP address, which is assigned when an Internet connection is created for a specific computer. Without DHCP, the IP address must be entered manually at each computer in an organization and a new IP address must be entered each time a computer moves to a new location on the network. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network.DHCP uses the concept of a 'lease' or amount of time that a given IP address will be valid for a computer. The lease time can vary depending on how long a user is likely to require the Internet connection at a particular location. It is especially useful in education and other environments where users change frequently. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are available IP addresses. The protocol also supports static addresses for computers that need a permanent IP address, such as Web servers. Answer option B is incorrect. WINS stands for Windows
Internet Naming Service. It is a part of the Microsoft Windows NT and 2000 Servers and it is used to manage the association of workstation names and locations with Internet Protocol addresses (IP addresses) without the user or an administrator having to be involved in each configuration change.
WINS automatically creates a computer name-IP address mapping entry in a table, ensuring that the name is unique and not a duplicate of someone else's computer name.
When a computer is moved to another geographic location, the subnet part of the IP address is likely to change. Using WINS, the new subnet information will be updated automatically in the WINS table.
WINS complements the NT Server's Dynamic Host Configuration Protocol (DHCP), which negotiates an IP address for any computer (such as workstation) when it is first defined to the network. If a computer user on a network is connected to a Windows NT/2000 server, he may find WINS mentioned in some of the network-related programs or system messages.

QUESTION NO: 2
Mark works as a Network Administrator for Company Inc. The company has a Windows-based network. The California branch of Company has been divided into two buildings in the same campus.
The company wants to interconnect these two buildings for proper communication among all the departments. Which of the following network types should Mark use to accomplish the task?
A. WAN
B. MAN
C. CAN
D. LAN
Answer: C
Explanation:
A campus area network (CAN) is a computer network that interconnects local area networks throughout a limited geographical area, such as a university campus, a corporate campus, or a military base. It could be considered a metropolitan area network that is specific to a campus setting.
A campus area network is, therefore, larger than a local area network but smaller than a wide area network. The term is sometimes used to refer to university campuses, while the term corporate area network is used to refer to corporate campuses instead. Although not considered a wide area network, a CAN extends the reach of each local area network within the campus area of an organization. In a CAN, the buildings of a university or corporate campus are interconnected using the same types of hardware and networking technologies that one would use in a LAN. In addition, all of the components, including switches, routers, and cabling, as well as wireless connection points, are owned and maintained by the organization. Answer option C is incorrect. Local Area Network
(LAN) represents a network that covers a very close geographic area, such as a floor of a building, a building itself, or a campus environment. LAN is a high-speed network that connects computers, printers, and other network devices together. The media types used in LANs include Ethernet, Fast
Ethernet (FE), Gigabit Ethernet (GE), Token Ring, and FDDI. A LAN may include servers, workstations, hubs, bridges, switches, routers, gateways, firewalls, etc. Answer option A is incorrect. A
Metropolitan Area Network (MAN) is a network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large Local Area Network (LAN) but smaller than the area covered by a Wide Area Network (WAN). The term is applied to the interconnection of networks in a city into a single larger network (which may then also offer efficient connection to a wide area network). It is also used to mean the interconnection of several local area networks by bridging them with backbone lines. The latter usage is also sometimes referred to as a campus network. A MAN usually interconnects a number of local area networks (LANs) using a highQuestions
& Answers PDF P-3
capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks and the Internet. Examples of metropolitan area networks of various sizes can be found in the metropolitan areas of London, England; Lodz, Poland; and Geneva, Switzerland. Large universities also sometimes use the term to describe their networks. A recent trend is the installation of wireless
MANs. Answer option B is incorrect. A wide area network (WAN) is a geographically dispersed telecommunications network. The term distinguishes a broader telecommunication structure from a local area network (LAN). A wide area network may be privately owned or rented, but the term usually connotes the inclusion of public (shared user) networks. An intermediate form of network in terms of geography is a metropolitan area network (MAN). A wide area network is also defined as a network of networks, as it interconnects LANs over a wide geographical area.

QUESTION NO: 3
John works as a Desktop Technician for NetPerfect Inc. The company has a Windows-based network.
For the last few days, the network of the company has become prone to the Man-in-the-Middle attack. John wants to send a confidential MS-Word file to his Manager through e-mail attachment.
He wants to ensure that no one is able to open and understand the file's message except the
Manager. Which of the following should John use to accomplish the task? Each correct answer represents a part of the solution. Choose all that apply.
A. Format the file
B. Encryption
C. File Compression
D. Apply password to the file
Answer: B,D
Explanation:
Encryption is the process of conversion of data into a form that cannot be easily understood by unauthorized persons. The encrypted data is known as cipher text. The cipher text can be converted back into its original form by a process known as decryption. Decryption is the reverse process of encryption. Encryption is a method of securing data while it travels over the Internet. The encryption software encodes information from plain text to encrypted text, using specific algorithms with a string of numbers known as a key. The encryption and decryption processes depend on both the information sender and the receiver having knowledge of a common encryption key. The length of the encryption key is an important security parameter. A longer key provides more secure data, as it is more difficult to determine the encryption key. Asymmetric encryption: Asymmetric encryption is a type of encryption that uses two keys, i.e., a public key and a private key pair for data encryption.
The public key is available to everyone, while the private or secret key is available only to the recipient of the message. For example, when a user sends a message or data to another user, the sender uses the public key to encrypt the dat
A. The receiver uses his private key to decrypt the data.
Symmetric encryption: Symmetric encryption is a type of encryption that uses a single key to encrypt and decrypt dat A.
Symmetric encryption algorithms are faster than public key encryption. Therefore, it is commonly used when a message sender needs to encrypt a large amount of datA. Data
Encryption Standard (DES) uses the symmetric encryption key algorithm to encrypt dat
A. John can
apply password to the file to open it. This will protect the file from unauthorized access. Answer option D is incorrect. File compression saves disk space. It is used to reduce the size of the file. It does not always protect the dat
A. Answer option A is incorrect. Formatting is done to change the
style of the file.

QUESTION NO: 4
You work as a Security Administrator for Net Perfect Inc. The company has a Windows-based network. The employees use Internet Explorer for Internet surfing. You want to block access to the vulnerable sites from the internal network of the company. To accomplish the task, you need to configure some security settings for Internet Explorer. Which of the following features of Internet
Explorer do you need to configure?
A. Content Advisor
B. Internet Explorer Compatibility Evaluator
C. InPrivate Browsing
D. Pop-up blocker
Answer: A
Explanation:
Content Advisor is a feature of Internet Explorer that allows an administrator to control the Internet contents that can be viewed on a single computer. Before configuring the Content Advisor, it needs to be enabled. When it is enabled, Internet Explorer first checks whether the website meets the specified criteria or not. A user can adjust the content rating settings to refilect the appropriate level of content in the areas of language, sex, nudity, and violence. He can also create a list of websites that are always viewable or never viewable regardless of the contents. Answer option D is incorrect.
The Internet Explorer Compatibility Evaluator (IECE) allows a user to determine whether a Web site or Web application will run properly in a new version of Internet Explorer such as Windows Internet
Explorer 7. IECE works by enabling compatibility logging in Internet Explorer, parsing logged issues, and creating a log file for uploading to the ACT Log Processing Service. A user can view the compatibility issues located by IECE as a report with the help of the Application Compatibility
Manager. Answer option B is incorrect. InPrivate Browsing is a feature of Internet Explorer 8. When this feature is active, Internet Explorer does not store history, cookies, temporary Internet files, or other data, thus protecting privacy of the user while using Internet Explorer 8. InPrivate Browsing can be activated by pressing Ctrl+Shift+P. This feature is quite helpful when a user does not want to leave any trace of his Web browsing activity such as, e-mailing at an Internet cafe or shopping for a gift.
Answer option A is incorrect. Pop-up blocker is a feature of Internet Explorer (IE) 7+. It enables users to block most pop-ups while they are surfing the Internet on their computers. Users can choose the level of blocking. They can either block all pop-up windows or allow pop-ups they want to see. By default, the pop-up blocker is enabled in IE 7+. While the pop-up blocker is enabled, a user can see the blocked pop-ups by clicking the IE 7+ information bar.

QUESTION NO: 5
Which of the following networking devices interconnects two or more computer networks, and selectively interchanges packets of data between them?
A. Switch
B. Router
C. Hub
D. Bridge
Answer: B
Explanation:
A router is a device that routes data packets between computers in different networks. It is used to connect multiple networks, and it determines the path to be taken by each data packet to its destination computer. A router maintains a routing table of the available routes and their conditions.
By using this information, along with distance and cost algorithms, the router determines the best path to be taken by the data packets to the destination computer. A router can connect dissimilar networks, such as Ethernet, FDDI, and Token Ring, and route data packets among them. Routers operate at the network layer (layer 3) of the Open Systems Interconnection (OSI) model. A router is a device that interconnects two or more computer networks, and selectively interchanges packets of data between them.Answer option D is incorrect. A bridge is an interconnectivity device that connects two local area networks (LANs) or two segments of the same LAN using the same communication protocols, and provides address filtering between them. Users can use this device to divide busy networks into segments and reduce network traffic. A bridge broadcasts data packets to all the possible destinations within a specific segment. Bridges operate at the data-link layer of the
OSI model. Answer option B is incorrect. A hub is a device used to link computers in a network. It connects computers that have a common architecture, such as Ethernet, ARCnet, FDDI, or Token
Ring. All hub-computer connections for a particular network use the same type of cable, which can be twisted-pair, coaxial, or fiber-optic. Hubs are generally used in star topology networks. Token Ring hubs are also known as Multistation Access Units (MSAUs). A hub works on the physical layer of the
OSI model. Answer option C is incorrect. A switch is a network device that selects a path or circuit for sending a data unit to its next destination. It is not required in smaller networks, but is required in large inter-networks, where there can be many possible ways of transmitting a message from a sender to destination. The function of switch is to select the best possible path.On an Ethernet local area network (LAN), a switch determines from the physical device (Media Access Control or MAC) address in each incoming message frame which output port to forward it to and out of. In a wide area packet-switched network, such as the Internet, a switch determines from the IP address in each packet which output port to use for the next part of its trip to the intended destination.

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Updated: May 24, 2022