ICND1: Chapter 3 Exam essentials + Test questions

192 to 223 110 xxxxx

1. What is the Class C address range in decimal and in binary?

1. C. The administrator must fix the conflict by hand at the DHCP server.

1. What must happen if a DHCP IP conflict occurs? A. Proxy ARP will fix the issue. B. The client uses a gratuitous ARP to fix the issue. C. The administrator must fix the conflict by hand at the DHCP server. D. The DHCP server will reassign new IP addresses to both computers.

0 1 2 3 4 5 6 7 8 9 A B C D E F

10. What are all the available characters that you can use in hexadecimal addressing?

10. B. SMTP D. FTP E. HTTP

10. Which of the following services use TCP? (Choose three.) A. DHCP B. SMTP C. SNMP D. FTP E. HTTP F. TFTP

12. C. 224.0.0.10

12. Which of the following is an example of a multicast address? A. 10.6.9.1 B. 192.168.10.6 C. 224.0.0.10 D. 172.16.9.5

13. C. TCP

13. The following illustration shows a data structure header. What protocol is this header from? A. IP B. ICMP C. TCP D. UDP E. ARP F. RARP

14. A. Application

14. If you use either Telnet or FTP, what layer are you using to generate the data? A. Application B. Presentation C. Session D. Transport

15. C. Internet

15. The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model? A. Application B. Host-to-Host C. Internet D. Network Access

16. C. 172.20.14.36 E. 192.168.24.43

16. Which two of the following are private IP addresses? A. 12.0.0.1 B. 168.172.19.39 C. 172.20.14.36 D. 172.33.194.30 E. 192.168.24.43

17. B. Host-to-Host

17. What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? A. Application B. Host-to-Host C. Internet D. Network Access

18. B. ICMP can provide hosts with information about network problems. C. ICMP is encapsulated within IP datagrams.

18. Which statements are true regarding ICMP packets? (Choose two.) A. ICMP guarantees datagram delivery. B. ICMP can provide hosts with information about network problems. C. ICMP is encapsulated within IP datagrams. D. ICMP is encapsulated within UDP datagrams.

19. C. 10xxxxxx

19. What is the address range of a Class B network address in binary? A. 01xxxxxx B. 0xxxxxxx C. 10xxxxxx D. 110xxxxx

Host to host layer or transport layer

2. What layer of the DoD model is equivalent to the Transport layer of the OSI model?

2. B. SSH

2. Which of the following Application layer protocols sets up a secure session that's similar to Telnet? A. FTP B. SSH C. DNS D. DHCP

20. DHCPDiscover DHCPOffer DHCPRequest DHCPAck

20. Put the steps in the DHCP process in the correct order DHCPOffer DHCPDiscover DHCPAck DHCPRequest

1 through 126

3. What is the valid range of a Class A network address?

3. C. Gratuitous ARP

3. Which of the following mechanisms is used by the client to avoid a duplicate IP address during the DHCP process? A. Ping B. Traceroute C. Gratuitous ARP D. Pathping

Loopback or diagnostics

4. What is the 127.0.0.1 address used for?

4. B. ARP

4. What protocol is used to find the hardware address of a local device? A. RARP B. ARP C. IP D. ICMP E. BootP

turn all host bits off

5. How do you find the network address from a listed IP address?

5. A. Application C. Transport D. Internet

5. Which of the following are layers in the TCP/IP model? (Choose three.) A. Application B. Session C. Transport D. Internet E. Data Link F. Physical

Turn all host bits on

6. How do you find the broadcast address from a listed IP address?

6. C. Class C

6. Which class of IP address provides a maximum of only 254 host addresses per network ID? A. Class A B. Class B C. Class C D. Class D E. Class E

10.0.0.0 through 10.255.255.255

7. What is the Class A private IP address space?

7. A. It uses ff:ff:ff:ff:ff:ff as a layer 2 broadcast. B. It uses UDP as the Transport layer protocol.

7. Which of the following describe the DHCP Discover message? (Choose two.) A. It uses ff:ff:ff:ff:ff:ff as a layer 2 broadcast. B. It uses UDP as the Transport layer protocol. C. It uses TCP as the Transport layer protocol. D. It does not use a layer 2 destination address.

172.16.0.0 through 172.31.255.255

8. What is the Class B private IP address space?

8. B. TCP

8. Which layer 4 protocol is used for a Telnet connection? A. IP B. TCP C. TCP/IP D. UDP E. ICMP

9. RFC 1918

9. Private IP addressing was specified in RFC _____.

192.168.0.0 through 192.168.255.255

9. What is the Class C private IP address space?

TCP is connection-oriented, acknowledged, and sequenced and has flow and error control, while UDP is connectionless, unacknowledged, and not sequenced and provides no error or flow control.

Compare and contrast UDP and TCP characteristics and features.

Transmission Control Protocol (TCP) is a connection-oriented protocol that provides reliable network service by using acknowledgments and flow control. User Datagram Protocol (UDP) is a connectionless protocol that provides low overhead and is considered unreliable.

Identify Host-to-Host layer protocols

Internet Protocol (IP) is a connectionless protocol that provides network address and routing through an internetwork. Address Resolution Protocol (ARP) finds a hardware address from a known IP address. Reverse ARP (RARP) finds an IP address from a known hardware address. Internet Control Message Protocol (ICMP) provides diagnostics and destination unreachable messages.

Identify Internet layer protocols.

Telnet is a terminal emulation program that allows you to log into a remote host and run programs. File Transfer Protocol (FTP) is a connection-oriented service that allows you to transfer files. Trivial FTP (TFTP) is a connectionless file transfer program. Simple Mail Transfer Protocol (SMTP) is a sendmail program

Identify Process/Application layer protocols

The Class A private address range is 10.0.0.0 through 10.255.255.255. The Class B private address range is 172.16.0.0 through 172.31.255.255. The Class C private address range is 192.168.0.0 through 192.168.255.255.

Identify the private IP ranges.

Internet Control Message Protocol (ICMP) works at the Network layer and is used by IP for many different services. ICMP is a management protocol and messaging service provider for IP.

Identify the role of ICMP.

version, header length, priority or type of service, total length, identification, flags, fragment offset, time to live, protocol, header checksum, source IP address, destination IP address, options, and finally, data.

Identify what is contained in the IP header. The fields of an IP header include

source port destination port sequence number acknowledgment number header length a field reserved for future use code bits window size checksum urgent pointer options field data field.

Identify what is contained in the TCP header of a connection-oriented transmission. The fields in the TCP header include the

source port destination port length checksum data

Identify what is contained in the UDP header of a connectionless transmission. The fields in the UDP header include only the

8. TCP 10. UDP

Mapping Applications to the DoD Model: Host-to-Host Layer 1. Internet Protocol (IP) 2. Telnet 3. FTP 4. SNMP 5. DNS 6. Address Resolution Protocol (ARP) 7. DHCP/BootP 8. Transmission Control Protocol (TCP) 9. X Window 10. User Datagram Protocol (UDP) 11. NFS 12. Internet Control Message Protocol (ICMP) 13. Reverse Address Resolution Protocol (RARP) 14. Proxy ARP 15. TFTP 16. SMTP 17. LPD

1. IP 6. ARP 12. ICMP 13. RARP 14. Proxy ARP

Mapping Applications to the DoD Model: Internet Layer 1. Internet Protocol (IP) 2. Telnet 3. FTP 4. SNMP 5. DNS 6. Address Resolution Protocol (ARP) 7. DHCP/BootP 8. Transmission Control Protocol (TCP) 9. X Window 10. User Datagram Protocol (UDP) 11. NFS 12. Internet Control Message Protocol (ICMP) 13. Reverse Address Resolution Protocol (RARP) 14. Proxy ARP 15. TFTP 16. SMTP 17. LPD

2. Telnet 3. FTP 4. SNMP 5. DNS 7. DHCP/BootP 9. X Window 11. NFS 15. TFTP 16. SMTP 17. LPD

Mapping Applications to the DoD Model: Process/Application Layer 1. Internet Protocol (IP) 2. Telnet 3. FTP 4. SNMP 5. DNS 6. Address Resolution Protocol (ARP) 7. DHCP/BootP 8. Transmission Control Protocol (TCP) 9. X Window 10. User Datagram Protocol (UDP) 11. NFS 12. Internet Control Message Protocol (ICMP) 13. Reverse Address Resolution Protocol (RARP) 14. Proxy ARP 15. TFTP 16. SMTP 17. LPD

A broadcast is to all devices in a subnet, a unicast is to one device, and a multicast is to some but not all devices.

Understand the difference between a broadcast, unicast, and multicast address.

Port numbers are used to identify the protocol or service that is to be used in the transmission.

Understand the role of port numbers.

11. C. Class C

Which Class of IP addresses uses the pattern shown here? NETWORK.NETWORK.NETWORK.HOST A. Class A B. Class B C. Class C D. Class D

The IP range for a Class A network is 1-126. This provides 8 bits of network addressing and 24 bits of host addressing by default.

Define the Class A IP address range.

The IP range for a Class B network is 128-191. Class B addressing provides 16 bits of network addressing and 16 bits of host addressing by default.

Define the Class B IP address range.

The IP range for a Class C network is 192 through 223. Class C addressing provides 24 bits of network addressing and 8 bits of host addressing by default.

Define the Class C IP address range.

Dynamic Host Configuration Protocol (DHCP) provides network configuration information (including IP addresses) to hosts, eliminating the need to perform the configurations manually. Domain Name Service (DNS) resolves hostnames—both Internet names such as www.lammle.com and device names such as Workstation 2—to IP addresses, eliminating the need to know the IP address of a device for connection purposes.

Describe the functions of DNS and DHCP in the network.

The DoD model is a condensed version of the OSI model, composed of four layers instead of seven

Differentiate between the DoD and the OSI network models