netcad pretest module 9-12

Netcad pretest answer module 9-12

1. Which destination IPv4 address does a DHCPv4 client use to send the initial DHCP Discover packet when the client is looking for a DHCP server?

224.0.0.1

the IP address of the default gateway

255.255.255.255

127.0.0.1

2. Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?

pre-allocation

automatic allocation

dynamic allocation

manual allocation

3. Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

broadcast DHCPACK

unicast DHCPACK

broadcast DHCPREQUEST

unicast DHCPREQUEST

4. Refer to the exhibit. A user is configuring a PC with the IP settings as displayed, but the operating system will not accept them. What is the problem?

The DNS settings are not configured.

The subnet mask is wrong.

The IP address is not a usable host address.

The gateway address is not configured.

5. Which two types of devices are typically assigned static IP addresses? (Choose two.)

hubs

laptops

printers

workstations

web servers

6. A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)

DHCPACK

DHCPOFFER

DHCPDISCOVER

DHCPREQUEST

DHCPNAK

7. Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)

It ensures that addresses are only applied to devices that require a permanent address.

It guarantees that every device that needs an address will get one.

It eliminates most address configuration errors.

It reduces the burden on network support staff.

It provides an address only to devices that are authorized to be connected to the network.

8. If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?

acknowledgment, request, offer, discover

request, discover, offer, acknowledgment

discover, offer, request, acknowledgment

request, acknowledgment, discover, offer

9. A DHCP server is used to assign IP addresses dynamically to the hosts on a network. The address pool is configured with 192.168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts?

253

252

251

254

10. Which statement is true about DHCP operation?

The DHCPDISCOVER message contains the IP address and subnet mask to be assigned, the IP address of the DNS server, and the IP address of the default gateway.

If the client receives several DHCPOFFER messages from different servers, it sends a unicast DHCPREQUEST message to the server from which it chooses to obtain the IP information.

When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.

A client must wait for lease expiration before it sends another DHCPREQUEST message.

11. Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)

IPv6 addresses are represented by hexadecimal numbers.

IPv6 addresses are 32 bits in length.

IPv4 addresses are represented by hexadecimal numbers.

IPv4 addresses are 32 bits in length.

IPv6 addresses are 64 bits in length.

IPv4 addresses are 128 bits in length.

12. Which network technology allows devices to communicate using both IPv4 and IPv6 addressing at the same time?

NAT64

dual stack

SLAAC

tunneling

13. What is an advantage of using IPv6 ?

higher bandwidth

more frequencies

more addresses for networks and hosts

faster connectivity

14. Which characteristic describes the default gateway of a host computer?

the physical address of the switch interface connected to the host computer

the logical address assigned to the switch interface connected to the router

the logical address of the router interface on the same network as the host computer

the physical address of the router interface on the same network as the host computer

15. Which number grouping is a valid IPv6 address?

12aa::1298:1200::129b

1b10::1100::2001::2900::
ab11::1102::0000::290

2001:0db8:3c55:0015:
1010:0000:abcd:ff13

1234:1230::1238::1299:1000::

16. Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?

static

stateful DHCPv6

SLAAC

EUI-64

17. Which IPv6 address notation is valid?

2001:0DB8::ABCD::1234

ABCD:160D::4GAB:FFAB

2001::ABCD::

2001:DB8:0:1111::200

18. Typically, which network device would be used to perform NAT for a corporate environment?

switch

DHCP server

server

host device

router

19. WWhat type of IPv6 address is FE80::1?

loopback

multicast

link-local

global unicast

20. Which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures?

dual-stack

encapsulation

translation

tunneling

21. Why is UDP well suited as the transport layer protocol for video applications?

UDP provides a reliable session.

UDP has low overhead.

UDP provides flow control using windows.

UDP provides acknowledgment of received data.

22. Which transport layer information is added to both the TCP and UDP headers?

window size

port numbers

IP addresses

acknowledgment flag

23. WWhat type of applications are best suited for using UDP?

applications that need reliable delivery

applications that are sensitive to delay

applications that require retransmission of lost segments

applications that are sensitive to packet loss

24. What protocol header information is used at the transport layer to identify a target application?

IP address

MAC address

port number

sequence number

25. A client device has initiated a secure HTTP request to a web browser. Which well-known port address number is associated with the destination address?

443

110

404

26. Which number or set of numbers represents a socket?

10.1.1.15

192.168.1.1:80

01-23-45-67-89-AB

27. Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
What is the application layer service being requested from Server0 by PC0?

SMTP

HTTP

HTTPS

FTP

DNS

28. What information is used by TCP to reassemble and reorder received segments?

acknowledgment numbers

port numbers

sequence numbers

fragment numbers

29. What type of port number is assigned by IANA to commonly used services and applications?

private port

registered port

well-known port

dynamic port

30. Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?

HTTP

TCP

UDP

31. Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?

It uses sequence numbers to reassemble segments.

It adds 20 bytes of overhead to application layer data.

It provides unreliable delivery of segments.

It establishes sessions with a three-way handshake.

32. What is the well-known port address number used by DNS to serve requests?

110

33. Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

The client sends a synchronization segment to begin the session.

The client sets the window size for the session.

The client randomly selects a source port number.

The client sends an ISN to the server to start the 3-way handshake.

34. A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the POP3 protocol to access messages stored on the email server?

143

110

35. What is the advantage of using SSH over Telnet?

SSH provides secure communications to access hosts.

SSH operates faster than Telnet.

SSH is easier to use.

SSH supports authentication for a connection request.

36. Which protocol retains a message in a mailbox on a server, even after the message is accessed by a user on a local client device?

IMAP4

SMTP

DNS

POP3

37. A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the IMAP4 protocol to access email messages stored on the local server?

143

110

38. Which protocol is used to transfer web pages from a server to a client device?

HTTP

HTML

POP

SSH

SMTP

39. A new employee is configuring a cell phone for company email. Once configured, what is the destination port number used when the employee sends an email from the phone?

110

143

40. Refer to the exhibit. Which protocol allows a user to type www.cisco.com instead of an IP address to access the web server?

HTTP

FTP

HTML

SNMP

DNS

41. Which communication tool allows multiple users to communicate with each other in real time by using a smartphone application or social media site?

instant messaging

web mail

blog

42. An employee of a company is attempting to remotely access a computer system using a virtual terminal (vty) session via Telnet. Which destination port number should the employee put in the remote access software being used?

110

43. What two characteristics describe an FTP connection? (Choose two.)

The server establishes the first connection with the client to control traffic that consists of server commands and client replies.

A large file requires more than two connections between the client and the server to successfully download it.

The client needs to run a daemon program to establish an FTP connection with a server.

Files can be downloaded from or uploaded to the server.

The first connection established is for traffic control and the second connection is created to transfer a file.

44. Which protocol is used by web servers to serve up a web page?

HTTP

POP

IMAP

FTP

45. WWhich protocol removes messages from the server after they have been accessed by a client?

POP3

SMTP

IMAP4

DNS

46. When analog voice signals are converted for use on a computer network, in what format are they encapsulated?

IP packets

bits

segments

frames

netcad exam module 1-4

netcad pretest module 5-8

netcad exam module 5-8

netcad pretest module 9-12

netcad exam module 9-12

netcad pretest module 13-16

netcad exam module 13-16

1. Which destination IPv4 address does a DHCPv4 client use to send the initial DHCP Discover packet when the client is looking for a DHCP server?

2. Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?

3. Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

4. Refer to the exhibit. A user is configuring a PC with the IP settings as displayed, but the operating system will not accept them. What is the problem?

5. Which two types of devices are typically assigned static IP addresses? (Choose two.)

6. A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)

7. Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)

8. If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?

10. Which statement is true about DHCP operation?

11. Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)

12. Which network technology allows devices to communicate using both IPv4 and IPv6 addressing at the same time?

13. What is an advantage of using IPv6 ?

14. Which characteristic describes the default gateway of a host computer?

15. Which number grouping is a valid IPv6 address?

16. Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?

17. Which IPv6 address notation is valid?

18. Typically, which network device would be used to perform NAT for a corporate environment?

19. WWhat type of IPv6 address is FE80::1?

20. Which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures?

21. Why is UDP well suited as the transport layer protocol for video applications?

22. Which transport layer information is added to both the TCP and UDP headers?

23. WWhat type of applications are best suited for using UDP?

24. What protocol header information is used at the transport layer to identify a target application?

25. A client device has initiated a secure HTTP request to a web browser. Which well-known port address number is associated with the destination address?

26. Which number or set of numbers represents a socket?

27. Open the PT activity. Perform the tasks in the activity instructions and then answer the question. What is the application layer service being requested from Server0 by PC0?

28. What information is used by TCP to reassemble and reorder received segments?

29. What type of port number is assigned by IANA to commonly used services and applications?

30. Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?

31. Which protocol operates at the transport layer of the TCP/IP model and ensures reliable delivery of IP packets?

32. What is the well-known port address number used by DNS to serve requests?

33. Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

34. A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the POP3 protocol to access messages stored on the email server?

35. What is the advantage of using SSH over Telnet?

36. Which protocol retains a message in a mailbox on a server, even after the message is accessed by a user on a local client device?

37. A new employee is attempting to configure a cell phone to connect to the email server of the company. Which port number should be selected when using the IMAP4 protocol to access email messages stored on the local server?

38. Which protocol is used to transfer web pages from a server to a client device?

39. A new employee is configuring a cell phone for company email. Once configured, what is the destination port number used when the employee sends an email from the phone?

40. Refer to the exhibit. Which protocol allows a user to type www.cisco.com instead of an IP address to access the web server?

41. Which communication tool allows multiple users to communicate with each other in real time by using a smartphone application or social media site?

42. An employee of a company is attempting to remotely access a computer system using a virtual terminal (vty) session via Telnet. Which destination port number should the employee put in the remote access software being used?

43. What two characteristics describe an FTP connection? (Choose two.)

44. Which protocol is used by web servers to serve up a web page?

45. WWhich protocol removes messages from the server after they have been accessed by a client?

46. When analog voice signals are converted for use on a computer network, in what format are they encapsulated?

27. Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
What is the application layer service being requested from Server0 by PC0?