Network + 2009 Q&A

1.

Which of the following protocols is used for connecting clients to a news server?

A.

IMAP4
B.

NCP
C.

NNTP
D.

SMTP

Correct Answer
C. NNTP

Explanation
NNTP (Network News Transfer Protocol) is the correct answer for this question. NNTP is a protocol used for connecting clients to a news server. It is specifically designed for the distribution, retrieval, and posting of news articles in Usenet newsgroups. NNTP allows clients to connect to a news server and access newsgroups to read and post articles. This protocol is commonly used by newsreader software to access and participate in online discussions and access news articles from various newsgroups.

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2.

Which of the following protocols allows user names and passwords to be transmitted as clear-text?

A.

PAP
B.

RADIUS
C.

CHAP
D.

SSH

Correct Answer
A. PAP

Explanation
PAP (Password Authentication Protocol) is a protocol that allows user names and passwords to be transmitted as clear-text. Unlike other protocols like RADIUS, CHAP, and SSH, PAP does not encrypt the user credentials, making it less secure. This lack of encryption makes PAP vulnerable to eavesdropping and unauthorized access.

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3.

Which of the following protocols are used for email traffic?

A.

SNMP, SSH, POP3
B.

NTP, POP3, IMAP4
C.

POP3, IMAP4, SMTP
D.

TFTP, SSH, NTP
E.

IMAP4, TFTP, SNMP

Correct Answer
C. POP3, IMAP4, SMTP

Explanation
POP3 (Post Office Protocol version 3), IMAP4 (Internet Message Access Protocol version 4), and SMTP (Simple Mail Transfer Protocol) are the protocols used for email traffic. POP3 is used to retrieve emails from a mail server, IMAP4 is used to access and manage emails on a mail server, and SMTP is used to send emails between mail servers. These protocols work together to ensure the proper functioning of email communication.

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4.

Which of the following protocols is used by several different operating systems to authenticate resources such as computers, users and printers?

A.

LDAP
B.

SMTP
C.

TCP
D.

UDP

Correct Answer
A. LDAP

Explanation
LDAP (Lightweight Directory Access Protocol) is a protocol used by several different operating systems to authenticate resources such as computers, users, and printers. It provides a standardized way for accessing and managing directory information, allowing organizations to centrally store and manage user credentials and other resource information. LDAP is commonly used in enterprise environments for authentication and authorization purposes, allowing users to access resources based on their credentials stored in a central directory. It is a widely adopted protocol and is supported by various operating systems and applications.

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5.

Which of the following authentication protocols uses plain text to transmit passwords over the internet?

A.

RADIUS
B.

PAP
C.

CHAP
D.

Kerberos

Correct Answer
B. PAP

Explanation
PAP (Password Authentication Protocol) is the correct answer because it is an authentication protocol that transmits passwords in plain text over the internet. This makes it less secure compared to other protocols like CHAP (Challenge-Handshake Authentication Protocol) and Kerberos, which use more secure methods to transmit passwords. RADIUS (Remote Authentication Dial-In User Service) is a protocol used for centralized authentication, authorization, and accounting for remote access.

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6.

Which of the following is considered a connection-oriented protocol?

A.

UDP
B.

SPX
C.

TCP
D.

IP

Correct Answer
C. TCP

Explanation
TCP (Transmission Control Protocol) is considered a connection-oriented protocol because it establishes a reliable and dedicated connection between the sender and receiver before transferring data. It ensures that all data packets are received in the correct order and without errors. TCP provides features like flow control, congestion control, and error detection, making it suitable for applications that require a guaranteed delivery of data, such as web browsing, email, and file transfer. UDP (User Datagram Protocol) is a connectionless protocol, meaning it does not establish a dedicated connection and does not guarantee the delivery of data packets. SPX (Sequenced Packet Exchange) is a protocol used in Novell NetWare networks. IP (Internet Protocol) is a network layer protocol responsible for addressing and routing packets, but it does not establish connections.

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7.

You work as a network technician at ABCompany.com. The newly appointed ABCompany.com trainee wants to know which network protocol has the ability to recover from lost/corrupted network packets during transmission.

A.

You should inform the trainee that the Internet Protocol Security (IPSec) protocol has the ability.
B.

You should inform the trainee that the Internetwork Packet Exchange (IPX) protocol has the ability.
C.

You should inform the trainee that the Kerberos protocol has the ability.
D.

You should inform the trainee that the Transmission Control Protocol (TCP) protocol has the ability.

Correct Answer
D. You should inform the trainee that the Transmission Control Protocol (TCP) protocol has the ability.

Explanation
The correct answer is that the Transmission Control Protocol (TCP) protocol has the ability to recover from lost/corrupted network packets during transmission. TCP uses a mechanism called automatic repeat request (ARQ) to ensure reliable delivery of data. When a packet is lost or corrupted, TCP detects the error and requests the sender to retransmit the packet. This process continues until the packet is successfully received, ensuring that no data is lost during transmission. TCP also uses sequence numbers and acknowledgments to ensure that packets are delivered in the correct order.

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8.

A user is trying to establish an FTP connection to a computer at home. The homecomputer is turned on and has Internet connectivity? however, they are unable to connectfrom the PC at work. The IP address that the user is trying to connect to is192.168.1.125.Which of the following is the MOST likely problem?

A.

The firewall at the office is blocking the outgoing connection.
B.

FTP client is not installed in the work computer.
C.

FTP server is not installed on the home computer.
D.

The IP address of the home computer is not routeable across the Internet.

Correct Answer
D. The IP address of the home computer is not routeable across the Internet.

Explanation
The IP address 192.168.1.125 is a private IP address, which means it is not routable across the internet. Private IP addresses are used within local networks and cannot be directly accessed from outside the network. Therefore, the user is unable to establish an FTP connection to the home computer from the PC at work.

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9.

Which of the following would occur at the application layer of the OSI model?

A.

UDP
B.

FTP
C.

TCP
D.

SPX

Correct Answer
B. FTP

Explanation
FTP (File Transfer Protocol) would occur at the application layer of the OSI model. The application layer is responsible for providing network services to user applications. FTP is a protocol that allows for the transfer of files between a client and a server over a network. It provides a set of commands and responses that enable users to upload, download, and manage files on a remote server.

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10.

Which of the following protocols is used to access files on a remote server?

A.

ARP
B.

SIP
C.

FTP
D.

NTP

Correct Answer
C. FTP

Explanation
FTP (File Transfer Protocol) is the correct answer because it is commonly used to access and transfer files between a client computer and a remote server. FTP allows users to authenticate themselves and establish a connection with a remote server to upload, download, or manipulate files. It provides a set of commands that enable users to navigate directories, create folders, and perform file operations on the remote server. ARP (Address Resolution Protocol) is used for mapping IP addresses to MAC addresses, SIP (Session Initiation Protocol) is used for initiating and terminating multimedia communication sessions, and NTP (Network Time Protocol) is used for synchronizing the time on network devices.

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Network + 2009 Q&a

Which of the following protocols is used for connecting clients to a news server?

Which of the following protocols allows user names and passwords to be transmitted as clear-text?

Which of the following protocols are used for email traffic?

Which of the following protocols is used by several different operating systems to authenticate resources such as computers, users and printers?

Which of the following authentication protocols uses plain text to transmit passwords over the internet?

Which of the following is considered a connection-oriented protocol?

You work as a network technician at ABCompany.com. The newly appointed ABCompany.com trainee wants to know which network protocol has the ability to recover from lost/corrupted network packets during transmission.

Which of the following would occur at the application layer of the OSI model?

Which of the following protocols is used to access files on a remote server?