CompTIA Network+ Certification (N10-003) Part 10

1. You are working as a network technician and you are asked to segment the network at one of your branch offices. Which of the following techniques could you use to segment the network?

Subnetting

Implementing DHCP

Implementing DNS

Installing hubs

Subnetting is used to segment a large network into smaller networks. These smaller networks can then be interconnected by using routers.

Explanation

Subnetting is used to segment a large network into smaller networks. These smaller networks can then be interconnected by using routers.

2. You are working as a network technician and you've been sent to a branch office to reconfigure the network to use dynamically assigned IP addresses instead of statistically assigned IP addresses. Which of the following services would you be required to install at the branch in order to automatically assign IP configuration to host computers?

Domain Name Service

Simple Network Management Protocol

Simple Mail Transfer Protocol

Dynamic Host Configuration Protocol

Dynamic Host Configuration Protocol (DHCP)is used to automate the assignment of IP configurations to host computers which are then called DHCP clients.

Explanation

Dynamic Host Configuration Protocol (DHCP)is used to automate the assignment of IP configurations to host computers which are then called DHCP clients.

3. What is required to automatically assign an IP configuration to a host computer?

A subnet mask

A DNS server

A DHCP server

None of the above

DHCP is used to automate the assignment of IP configurations to host computers which are then called DHCP clients

Explanation

DHCP is used to automate the assignment of IP configurations to host computers which are then called DHCP clients

4. Which of the following is used to automate the IP configuration of network hosts?

ARP

DNS

DHCP

WINS

DHCP is responsible for automating the IP configuration of DHCP clients.

Explanation

DHCP is responsible for automating the IP configuration of DHCP clients.

5. Which of the following best describes IGMP?

It establishes secure Telnet sessions over TCP/IP

It is responsible for resolving IP addressing

It is responsible for managing IP multicast groups

It provides maintenance and reporting functions

Internet Group Management Protocol (IGMP) is responsible primarily for managing IP multicast groups. IP multicasts can send messages or packets to a specified group of hosts.

Explanation

Internet Group Management Protocol (IGMP) is responsible primarily for managing IP multicast groups. IP multicasts can send messages or packets to a specified group of hosts.

6. You are working as a technician and you asked for permission to divide the network at the main office into smaller subnets. Your boss wants to know what valid reason there is for submetting a network. How do you answer?

To separate the network into smaller broadcast domains

To minimize TCP/IP conflicts

To convert from DHCP to static addresses

To allow reception of multicast telcom traffic

Subnetting is used to divide a large network into smaller network segments, minimizing network traffic. Subnets are interconnected by means of routers and do not allow broadcast messages to pass from one subnet to another.

Explanation

Subnetting is used to divide a large network into smaller network segments, minimizing network traffic. Subnets are interconnected by means of routers and do not allow broadcast messages to pass from one subnet to another.

7. Which of the following protocols provides maintenance and reporting functions?

ICMP

IGMP

ARP

RIP

Internet Control Management Protocol (ICMP) provides maintenance and reporting functions. ICMP is the protocol used by the PING program.

Explanation

Internet Control Management Protocol (ICMP) provides maintenance and reporting functions. ICMP is the protocol used by the PING program.

8. Which of the following best describes ARP?

It allows remote logon over the network

It is responsible for resolving IP addressing

It is responsible for managing IP multicast groups

It provides maintenance and reporting functions

Address Resolution Protocol (ARP) is responsible for resolving IP addresses to Network Interface layer addresses, including hardware addresses. ARP can resolve an IP address to a Media Access Control (MAC) address.

Explanation

Address Resolution Protocol (ARP) is responsible for resolving IP addresses to Network Interface layer addresses, including hardware addresses. ARP can resolve an IP address to a Media Access Control (MAC) address.

9. Which of the following protocols is used to transmit data between a web browser and a web server?

SSH

HTTP

SFTP

IMAP4

HTTP is the protocol that is used by a web browser to communicate with web servers.

Explanation

HTTP is the protocol that is used by a web browser to communicate with web servers.

10. Which of the following is a secure alternative to Telnet?

SSH

HTTP

SFTP

IMAP4

Telnet is a terminal emulation protocol that provides a remote logon to another host over the network. The SSH protocol is used to establish a secure Telnet session over TCP/IP. It can thus be used instead of Telnet.

Explanation

Telnet is a terminal emulation protocol that provides a remote logon to another host over the network. The SSH protocol is used to establish a secure Telnet session over TCP/IP. It can thus be used instead of Telnet.

11. You are a network technician working at a company with a computer lab which uses Internet Assigned Number Authority (IANA) private IP addresses. Which of the following address could represent an IP address used in the computer lab?

19.109.220.103

188.209.75.46

192.168.54.10

216.127.51.121

There are three IANA private IP address ranges. These are 10.0.0.0 through 10.255.255.255, 172.31.255.255 and 192.168.0.0 through 192.168.255.255.

Explanation

There are three IANA private IP address ranges. These are 10.0.0.0 through 10.255.255.255, 172.31.255.255 and 192.168.0.0 through 192.168.255.255.

12. Which of the following is not provided by a DHCP server?

Automatic configuration of IP address, subnet mask and default gateway

The IP address of the perferred WINS server

The IP address of the preferred DNS server

Automatic configuration of MAC address

The MAC address is not configurable and is assigned to a device by the manufacturer of that device

Explanation

The MAC address is not configurable and is assigned to a device by the manufacturer of that device

13. Which of the following provides error reporting in TCP/IP?

NNTP

ICMP

IGMP

SNMP

Internet Control Message Protocol (ICMP) is used for network management and control. It provides error testing and reporting for TCP/IP.

Explanation

Internet Control Message Protocol (ICMP) is used for network management and control. It provides error testing and reporting for TCP/IP.

14. Which of the following protocols are primarily responsible for managing IP multicast groups?

ARP

NNTP

ICMP

IGMP

IGMP (Internet Group Management Protocol) is responsible primarily for managing IP multicast groups, IP multicasts can send messages or packets to a specific group of hosts.

Explanation

IGMP (Internet Group Management Protocol) is responsible primarily for managing IP multicast groups, IP multicasts can send messages or packets to a specific group of hosts.

15. Which of the following is used to manage IP multicast sessions?

NNTP

ICMP

IGMP

SNMP

Internet Group Management Protocol (IGMP) is used to manage IP multicast sessions. It does not provide error reporting.

Explanation

Internet Group Management Protocol (IGMP) is used to manage IP multicast sessions. It does not provide error reporting.

16. Which of the following is a private IP address?

120.168.140.21

15.169.144.12

169.254.134.29

192.168.127.23

Class C addresses use the first 24 bits for network identification and the last 8 bits for host identification. The result is an IP address range from 192.0.0.0 through 223.255.255.255 and default subnet mask of 255.255.255.0. Of this range, 192.168.0.0 to 192.168.255.255 is reserved for private IP addresses.

Explanation

Class C addresses use the first 24 bits for network identification and the last 8 bits for host identification. The result is an IP address range from 192.0.0.0 through 223.255.255.255 and default subnet mask of 255.255.255.0. Of this range, 192.168.0.0 to 192.168.255.255 is reserved for private IP addresses.

17. Which of the following best describes ICMP?

It establishes secure Telnet sessions over TCP/IP

It is responsible for resolving IP addressing

It is responsible for managing IP multicast groups

It provides maintenance and reporting functions

Internet Control Management Protocol (ICMP) provides maintenance and reporting functions. ICMP is the protocol used by the PING program.

Explanation

Internet Control Management Protocol (ICMP) provides maintenance and reporting functions. ICMP is the protocol used by the PING program.

18. Which of the following is a private IP address?

10.0.0.1

120.0.0.1

127.0.0.1

169.254.0.1

Class A IP addresses use the first 8 bits for network identification and the last 24 bits for host identification. The result is an IP address range from 0.0.0.0 through 127.255.255.255 and a default subnet mask of 255.0.0.0. However, 127.0.0.0 through 127.255.255.255 is reserved for diagnostics. Of this range, 10.0.0.0 to 10.255.255.255 is reserved for private IP addresses.

Explanation

Class A IP addresses use the first 8 bits for network identification and the last 24 bits for host identification. The result is an IP address range from 0.0.0.0 through 127.255.255.255 and a default subnet mask of 255.0.0.0. However, 127.0.0.0 through 127.255.255.255 is reserved for diagnostics. Of this range, 10.0.0.0 to 10.255.255.255 is reserved for private IP addresses.

19. Which of the following protocols is used to transmit e-mail between the two e-mail servers?

Post Office Protocol, version 3 (POP3)

Simple Mail Transfer Protocol (SMTP)

Internet Control Message Protocol (ICMP)

Internet Message Access Protocol, version 4 (IMAP4)

Simple Mail Transfer Protocol (SMTP) is used for sending e-mail messages.

Explanation

Simple Mail Transfer Protocol (SMTP) is used for sending e-mail messages.

20. You work as a network administrator. During a routine maintenance you discover that the load on the DHCP server is unusually high. How would you reduce this traffic?

Configure the DHCP server to increase lease expiration time

Configure the DHCP server to decrease lease expiration time

Configure the DHCP client to increase lease expiration time

Configure the DHCP client to decrease lease expiration time

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. Whenever a DHCP enabled client computer boots up, it broadcasts a DHCP message across the network in order to locate a DHCP server. If a DHCP server is available, it will respond with a DHCP server. This process is repeated when the DHCP client must renew its lease, which is usually after 87.5 percent of the lease expiration time has elapsed. Thus, one way to reduce the DHCP traffic wold be to reduce the frequency at which clients need to renew the DHCP leases.

Explanation

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. Whenever a DHCP enabled client computer boots up, it broadcasts a DHCP message across the network in order to locate a DHCP server. If a DHCP server is available, it will respond with a DHCP server. This process is repeated when the DHCP client must renew its lease, which is usually after 87.5 percent of the lease expiration time has elapsed. Thus, one way to reduce the DHCP traffic wold be to reduce the frequency at which clients need to renew the DHCP leases.

21. You are working as a network technician and you're asked to troubleshoot a Windows XP workstation. The IPCONFIG /ALL command displays an IP address of 169.254.1.37. Considering the given information, which of the following statements describes the TCP/IP configuration of the Windows XP Professional workstation?

The computer has been configured with a static address of 169.254.1.37

The computer is set for DHCP, but no DHCP server is available on the network

The computer received the address from a DHCP server on the network

The computer received the address from a BootP server on the network

IP address 169.254.1.37 is a self-assigned Automatic Private IP Addressing (APIPA) address. It is automatically assigned to a Windows-based DHCP client that fails to obtain a valid lease from a DHCP server.

Explanation

IP address 169.254.1.37 is a self-assigned Automatic Private IP Addressing (APIPA) address. It is automatically assigned to a Windows-based DHCP client that fails to obtain a valid lease from a DHCP server.

22. Which of the following is not a private IP address?

10.172.22.1

172.26.75.46

192.168.54.10

216.172.168.10

There are three IANA private IP address ranges. These are 10.0.0.0 through 10.255.255.255, 172.16.0.0 through 172.31.255.255 and 192.168.0.0 through 192.168.255.255. 216.172.168.10 does not fall in any of these private IP address ranges.

Explanation

There are three IANA private IP address ranges. These are 10.0.0.0 through 10.255.255.255, 172.16.0.0 through 172.31.255.255 and 192.168.0.0 through 192.168.255.255. 216.172.168.10 does not fall in any of these private IP address ranges.

23. Which of the following is a public IP address?

10.254.200.14

120.254.200.14

169.254.200.14

192.168.200.14

Class A IP addresses use the first 8 bits for network identification and the last 24 bits for host identification. The result is an IP address range from 0.0.0.0 through 127.255.255.255 and a default subnet mask of 255.0.0.0. However, 127.0.0.0 through 127.255.255.255 is reserved for diagnostics. Of this range, 10.0.0.0 to 10.255.255.255 is reserved for private IP addresses.

Explanation

Class A IP addresses use the first 8 bits for network identification and the last 24 bits for host identification. The result is an IP address range from 0.0.0.0 through 127.255.255.255 and a default subnet mask of 255.0.0.0. However, 127.0.0.0 through 127.255.255.255 is reserved for diagnostics. Of this range, 10.0.0.0 to 10.255.255.255 is reserved for private IP addresses.

24. The network you support consists of two subnets. A DHCP server is installed on one subnet and is configured to supply IP leases to hosts on both subnets. However, only hosts on the same subnet as the DHCP server receives IP leases from the DHCP server. Which IP address would be assigned to hosts on the other subnet?

Static IP addresses

Class A addresses

IP addresses in the 24.0.0.0 to 239.255.255.255 range

IP addresses in the 169.254.0.0 to 169.255.255.255 range

When DHCP clients fail to receive an IP lease from the DHCP server, they are assigned APIPA addresses, which are in the range 169.254.0.0 to 169.255.255.255.

Explanation

When DHCP clients fail to receive an IP lease from the DHCP server, they are assigned APIPA addresses, which are in the range 169.254.0.0 to 169.255.255.255.

25. Which of the following will reduce DHCP traffic on the network?

Increasing the lease expiration time on all DHCP clients

Increasing the lease expiration time on the DHCP server

Decreasing the lease expiration time on all DHCP clients

Decreasing the lease expiration time on the DHCP server

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. Whenever a DHCP enabled client computer boots up, it broadcasts a DHCP message across the network in order to locate a DHCP server. If a DHCP server is available, it will respond with a DHCP server. This process is repeated when the DHCP client must renew its lease, which is usually after 87.5 percent of the lease expiration time has elapsed. Thus, one way to reduce the DHCP traffic wold be to reduce the frequency at which clients need to renew the DHCP leases.

Explanation

DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network. Whenever a DHCP enabled client computer boots up, it broadcasts a DHCP message across the network in order to locate a DHCP server. If a DHCP server is available, it will respond with a DHCP server. This process is repeated when the DHCP client must renew its lease, which is usually after 87.5 percent of the lease expiration time has elapsed. Thus, one way to reduce the DHCP traffic wold be to reduce the frequency at which clients need to renew the DHCP leases.

26. Which of the following statements regarding private IP address is true?

A private IP address is required to access resources on the Internet

Public organizations are not allowed to use private IP addresses

Private IP addresses must be obtained from the American Registry for Internet Numbers (ARIN)

Private IP addresses allow more than one private IP network to have the same IP address

Private IP addresses are reserved for use on private networks. Therefore, these addresses may be duplicated across many networks without causing IP address conflicts.

Explanation

Private IP addresses are reserved for use on private networks. Therefore, these addresses may be duplicated across many networks without causing IP address conflicts.

27. You are working as a technician for a company that uses private IP addressing for the lab network. A trainee asks you which of the following statements would not be true with regard to private IP addressing. How would you answer?

Private IP addresses may be duplicated across many networks without causing address conflicts

Private IP addresses must be obtained dynamically from the ISP

Private IP addresses allow organizations to share a single public IP address

Large networks may be broken into several private IP networks

Private IP addresses are reserved for use on private networks. However, private networks require a public IP address to access resources on the Internet. These public IP addresses, not private IP addresses, must be obtained dynamically from the ISP.

Explanation

Private IP addresses are reserved for use on private networks. However, private networks require a public IP address to access resources on the Internet. These public IP addresses, not private IP addresses, must be obtained dynamically from the ISP.

28. Which of the following protocols is used to transmit e-mail between an e-mail client and an e-mail server?

Hypertext Transfer Protocol (HTTP)

Post Office Protocol, version 3 (POP3)

Simple Mail Transfer Protocol (SMTP)

Internet Control Message Protocol (ICMP)

POP3 and IMAP4 transmit e-mail between the e-mail client and the e-mail server.

Explanation

POP3 and IMAP4 transmit e-mail between the e-mail client and the e-mail server.

29. Which of the following statements is false?

A public IP address is required for users on a priviate network to access resources on the Internet

Public IP addresses are regulated by the American Registry for Internet Numbers (ARIN)

Private IP addresses allow more than one private IP network to have the same IP address

Private IP addresses may not be duplicated

Private IP addresses are reserved for use on private networks. Therefore, these addresses may be duplicated across many networks without causing IP address conflicts.

Explanation

Private IP addresses are reserved for use on private networks. Therefore, these addresses may be duplicated across many networks without causing IP address conflicts.

30. Your network consists of two subnets. A DHCP server is installed on one subnet and is configured to supply IP leases to hosts on both subnets. However, only hosts on the same subnet as the DHCP server receives IP leases from the DHCP server. What will ensure that hosts on the remote subnet are also assigned IP leases?

Authorizing the scope needed for the remote subnet in the DHCP server

Correct the error in the routers routing table

Install and configure a DHCP Relay Agent on the same remote subnet as the DHCP server

Install and configure a DHCP Relay Agent on remote subnet

The clients on the remote subnet do not receive any IP configuration from the DHCP server. A possible cause of this problem is the router. The router might not be forwarding DHCP traffic between the two subnets. We can resolve this problem by installing a DHCP Relay agent on the subnet that has no DHCP server, namely the remote subnet.

Explanation

The clients on the remote subnet do not receive any IP configuration from the DHCP server. A possible cause of this problem is the router. The router might not be forwarding DHCP traffic between the two subnets. We can resolve this problem by installing a DHCP Relay agent on the subnet that has no DHCP server, namely the remote subnet.