Computer Knowledge

Computer Networks

2,461 Questions

Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.

OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands

Computer Networks Questions

Multiple choice mcse

What is the tool used to capture and monitor network traffic in a wireless network configured using Wired Equivalent Privacy?

  1. Netdom

  2. Network monitor

  3. Wireless monitor

  4. Event viewer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

While 'Network Monitor' is a general tool, 'Wireless Monitor' or specialized wireless sniffers are used to capture traffic in WEP-encrypted environments. However, 'Wireless Monitor' is not a standard Windows tool name; usually, this requires third-party software or specific drivers.

Multiple choice mcse

You are the network administrator for your company. You install two servers running Microsoft Windows Server 2003 and 70 client computers on the network. All computers on the network receive their IP addresses automatically from a DHCP server. You are unable to connect to other computers on the network from Computer_A. You run the ipconfig utility on Computer_A and receive the following results: IP Address: 0.0.0.0 Subnet Mask: 0.0.0.0 . What could be the cause of the problem? (Choose two options.)

  1. The static IP address configured for Computer_A is duplicat

  2. The DHCP server is down

  3. The DHCP server is out of IP addresses

  4. The DNS server is down

  5. The DHCP server does not have a DNS server option configured
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice mcse

You are the network administrator for Toys World, Ltd. The network consists of a single DNS domain named toysworld.com. You replace a UNIX server with a Windows Server 2003 computer named Srv1. Srv1 is the DNS server and Start of Authority (SOA) for toysworld.com. A UNIX server named Srv2 is the mail server for toysworld.com. You receive reports that Internet users cannot send e-mail to the toysworld.com domain. You need to ensure that Internet users can send e-mail to the toysworld.com domain. What should you do?

  1. Add an _smtp service locator (SRV) DNS record for Srv2.

  2. Add a mail exchange (MX) DNS record for Srv2.

  3. Add an alias (CNAME) record for mail.toysworld.com.

  4. Enable the SMTP service on Srv1.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An MX (Mail Exchange) record is required in DNS to tell other mail servers where to deliver email for a specific domain. Without an MX record pointing to Srv2, external mail servers will not know which host handles the email for toysworld.com.

Multiple choice mcse

Your domain user account is a member of the Enterprise Admins security group that is created in the forest root domain of your company's Active Directory forest. Your company has recently acquired another company, and you are working with your network administrators to integrate the computers at the offices of the new company into your network. As part of this effort, you want to delegate the responsibility of authorizing Dynamic Host Configuration Protocol (DHCP) servers to an additional security group to allow other administrators to authorize DHCP servers throughout your network. Which tool should you use?

  1. Netsh

  2. Active Directory Users and Computers

  3. DHCP Console

  4. Active Directory Sites and Services
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In Windows Server 2003, DHCP server authorization is managed through Active Directory Sites and Services, not the DHCP console itself. This tool allows delegating authorization permissions to security groups, enabling other administrators to authorize DHCP servers throughout the network.

Multiple choice mcse

You are a network administrator for your company. You enable Routing and Remote Access on a computer running Windows Server 2003. You plan to use Internet Protocol (IP) packet filters to manage the protocols available to remote access clients. Which component of the Routing and Remote Access console should you use to implement the IP packet filters?

  1. The Properties dialog box of the remote access server

  2. The conditions of a remote access policy

  3. The profile of a remote access policy

  4. The Properties dialog box of the remote access ports
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Windows Server 2003 RRAS, IP packet filters for remote access clients are configured within the Profile of a Remote Access Policy. This allows administrators to restrict traffic based on the specific policy that the user matches during connection.

Multiple choice mcse

Joe is the administrator for a multi-site network. He would like to configure one of his servers running Microsoft Windows Server 2003, Enterprise Edition, with Routing and Remote Access to dial a modem connection if the T1 connection goes down. How should Joe configure Routing and Remote Access to dial the modem connection only after the T1 goes down?

  1. Configure the T1 Demand-dial with a metric of 1, and the modem Demand-dial with a metric of 1

  2. Configure the T1 Demand-dial with a metric of 1, and the modem Demand-dial with a metric of 2

  3. Configure the T1 Demand-dial with a metric of 2, and the modem Demand-dial with a metric of 1

  4. Configure the T1 Demand-dial with a metric of 2, and the modem Demand-dial with a metric of 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In routing, the 'metric' determines the preference of a route. A lower metric is preferred. By setting the T1 metric to 1 and the modem metric to 2, the system will always use the T1 while it is available and only fail over to the modem when the T1 route is lost.

Multiple choice mcse

You are the Windows 2003 network administrator for TalkTell Mobiles company. The network contains one primary internal DNS server, named DNSInt, and one primary external DNS server, named DNSExt. Several secondary DNS servers exist on the network. DNSExt hosts only records for your company's Web, FTP, and mail servers. The Web, FTP, and mail servers have static IP addresses. When you monitor the secondary DNS server, you notice that Transfer SOA Requests Sent is high. You want to minimize the bandwidth required for the transfer of SOA requests. What should you do? (Choose two options. Each correct answer presents part of the solution.)

  1. Disable dynamic updates on DNSExt

  2. Increase the Time to Live (TTL) for the SOA record

  3. Decrease the Time to Live (TTL) for the SOA record

  4. Configure the notify list on DNSExt to include the secondary DNS servers

  5. Decrease the value of the Refresh interval in the SOA record
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Configuring the 'Notify' list on the primary DNS server (DNSExt) ensures that secondary servers are immediately informed of changes. This prevents secondary servers from frequently polling the primary with SOA queries to check for updates, thereby reducing unnecessary bandwidth usage.

Multiple choice mcse

You are the systems administrator for a large department. You have configured the servers to require IPSec authentication and data verification for all data communications. To verify that IPSec is being used for all network communications, you have captured network traffic using Network monitor. What protocol is displayed in a Network Monitor entry when IPSec is being used to authenticate a frame?

  1. ESP

  2. IPSec

  3. TCP

  4. AH
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When IPSec is used for authentication only (not encryption), it uses the Authentication Header (AH) protocol, which provides data integrity and authentication but not confidentiality. ESP (Encapsulating Security Payload) is used when encryption is needed. Network Monitor would display AH in the protocol field for authentication-only IPSec.

Multiple choice networking

What is the default port of a SMTP server?

  1. 8

  2. 21

  3. 80

  4. 25

  5. 110
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

SMTP (Simple Mail Transfer Protocol) uses TCP port 25 by default for server-to-server communication. Port 80 is for HTTP, 21 is for FTP, 110 is for POP3, and 443 is for HTTPS.

Multiple choice networking

What is the directory service called in Netware?

  1. Active Directory

  2. Domain Name System

  3. NDS

  4. NWLink

  5. DNS
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Novell NetWare's directory service is called NDS (Novell Directory Service), later renamed eDirectory. Active Directory is Microsoft's equivalent, DNS is the Domain Name System, and NWLink is NetWare's IPX/SPX protocol implementation. NDS was NetWare's hierarchical directory database for network resource management.

Multiple choice networking

What utility do you use in Windows 95 to release your IP address from a DCHP server?

  1. IPCFG

  2. WINIPCFG

  3. IPREL

  4. DCHP

  5. NETCFG
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

WINIPCFG is the graphical utility in Windows 95/98 for viewing and renewing DHCP IP address configuration. It provides a GUI interface to release and renew IP addresses from a DHCP server. The command-line equivalent ipconfig was introduced in later Windows versions. IPCFG is not a valid Windows command.

Multiple choice networking

What utility can you use to verify a remote computer is accepting connections on the port you are using?

  1. FTP

  2. Telnet

  3. SNMP

  4. NETSTAT

  5. WINIPCFG
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Telnet can be used to test connectivity to a specific port on a remote host (e.g., telnet 80). If the screen goes blank or connects, the port is open. If it fails, the port is closed or blocked. FTP and SNMP are specific application protocols, not general port-testing utilities.

Multiple choice networking

Which protocol sends electronic mail?

  1. Mail Transfer

  2. POP3

  3. FTP

  4. SMTP

  5. Outbox
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

SMTP (Simple Mail Transfer Protocol) is the standard protocol for sending email between mail servers. It handles the transmission and delivery of electronic mail messages across the Internet. POP3 is for retrieving mail, FTP transfers files, and 'Mail Transfer' and 'Outbox' are not protocol names.

Multiple choice networking

Which file on a workstation resolves names similar to a DNS server?

  1. HOSTS

  2. DHCP

  3. DNSHOSTS

  4. NAMEHOSTS

  5. SMHOSTS
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The HOSTS file (typically located at /etc/hosts on Unix or C:\Windows\System32\drivers\etc\hosts on Windows) maps hostnames to IP addresses locally, providing name resolution before querying a DNS server. DHCP is for assigning IP addresses, not name resolution.

Multiple choice networking

________ensure(s) that data are transferred whole, in sequence, and without error from one node on the network to another.

  1. Data Packets

  2. Addressing

  3. Protocol

  4. File services
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Protocols are sets of rules that govern data transmission, ensuring packets arrive complete, in order, and error-free. Examples include TCP which guarantees reliable delivery through sequencing, acknowledgments, and retransmission of lost packets.