Chapter 06: Introduction to the Internet Protocol

A. DHCP C. SNMP F. TFTP DHCP, SNMP, and TFTP use UDP for their transmissions.

6-11. Which of the following services use UDP? (Choose three.) A. DHCP B. SMTP C. SNMP D. FTP E. HTTP F. TFTP

C. RDP Remote Desktop Protocol (RDP) allows for a GUI connection to a remote desktop.

6-14. You need to have a connection to run applications that are installed on only your desktop computer at your office. Which protocol will provide a GUI interface to your work computer? A. Telnet B. FTP C. RDP D. IMAP E. SMTP

D. FTP File Transfer Protocol (FTP) is used for transferring files between hosts.

6-16. You need to transfer files between two hosts. Which protocol can you use? A. SNMP B. RIP C. NTP D. FTP

D. DNS DNS uses TCP for zone transfers between servers and UDP for hostname resolution by clients.

6-20. Which of the following uses both TCP and UDP? A. FTP B. SMTP C. Telnet D. DNS

B. SSH Secure Shell (SSH) allows secure remote administration of Unix/Linux servers.

6-5. You need to log in to a Unix/Linux server across a network that is not secure. Which of the following protocols will allow you to remotely administer this server securely? A. Telnet B. SSH C. SFTP D. HTTP

E. TCP, 23 Telnet uses TCP at the Transport layer with a default port number of 23.

6-8. What layer 4 protocol is used for a Telnet connection, and what is the default port number? A. IP, 6 B. TCP, 21 C. UDP, 23 D. ICMP, 21 E. TCP, 23

D. Application SMTP resides at the Application layer of both the OSI and DoD models.

6-1. The OSI model has seven layers and the DoD has four. At which layer does SMTP work in both models? A. Network B. Transport C. Session D. Application E. Internet

B. SMTP D. FTP E. HTTP C. SNMP SMTP, FTP, HTTP, and SNMP are connection-oriented and use TCP.

6-10. Which of the following services use TCP? (Choose four.) A. DHCP B. SMTP C. SNMP D. FTP E. HTTP F. TFTP

C. Telnet D. FTP E. TFTP Telnet, FTP, and TFTP are Application layer protocols. IP is a Network layer protocol, and TCP is a Transport layer protocol.

6-12. Which of the following TCP/IP protocols are used at the Application layer of the OSI model? (Choose three.) A. IP B. TCP C. Telnet D. FTP E. TFTP

C. SMTP SMTP is used by email servers to exchange messages with each other.

6-13. Which of the following protocols is used by email servers to exchange messages with one another? A. POP3 B. IMAP C. SMTP D. HTTP

B. SNMP Simple Network Management Protocol (SNMP) can use both TCP and UDP, and SNMP version 3 provides secure polling and alerts.

6-15. Which of the following protocols can use TCP and UDP, permits authentication and secure polling of network devices, and allows for automated alerts and reports on network devices? A. DNS B. SNMP C. SMTP D. TCP

B. Host-to-Host The Host-to-Host layer in the IP stack (DoD model) is equivalent to the Transport layer of the OSI model.

6-17. What layer in the IP stack is equivalent to the Transport layer of the OSI model? A. Application B. Host-to-Host C. Internet D. Network Access

C. NTP Network Time Protocol (NTP) ensures consistent time across network devices.

6-18. You need to make sure that the time is consistent across all your network devices. What protocol do you need to run on your network? A. FTP B. SCP C. NTP D. RTP

A. They use different port numbers. Port numbers allow servers to distinguish between different simultaneous sessions from the same host.

6-19. Which of the following allows a server to distinguish among different simultaneous requests from the same host? A. They use different port numbers. B. A NAT server changes the IP address for subsequent requests. C. A server is unable to accept multiple simultaneous sessions from the same host. D. One session must end before another can begin. E. The MAC address for each one is unique.

D. 443 HTTPS, or Secure HTTP, uses port 443 by default.

6-2. You need to have secure communications using HTTPS. What port number is used by default? A. 69 B. 23 C. 21 D. 443

C. DHCP Dynamic Host Configuration Protocol (DHCP) is used to provide IP information, including IP address, subnet mask, default gateway, and DNS, to hosts on the network.

6-3. You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this? A. SMTP B. SNMP C. DHCP D. ARP

B. ARP Address Resolution Protocol (ARP) is used to find the hardware (MAC) address from a known IP address.

6-4. What protocol is used to find the hardware address of a local device? A. RARP B. ARP C. IP D. ICMP E. BootP

C. 53 The problem is with DNS, which uses both TCP and UDP on port 53.

6-6. If you can ping by IP address but not by hostname or FQDN, which of the following port numbers is related to the server process that is involved? A. 21 B. 23 C. 53 D. 69 E. 80

A. It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast. B. It uses UDP as the Transport layer protocol. DHCP Discover messages use a layer 2 broadcast address (FF:FF:FF:FF:FF:FF) and UDP as the Transport layer protocol.

6-7. 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.

C. They can provide hosts with information about network problems. D. They are encapsulated within IP datagrams. ICMP is used to send error messages and is encapsulated within IP datagrams.

6-9. Which statements are true regarding ICMP packets? (Choose two.) A. They acknowledge receipt of a TCP segment. B. They guarantee datagram delivery. C. They can provide hosts with information about network problems. D. They are encapsulated within IP datagrams. E. They are encapsulated within UDP datagrams.