DsmbISP Chapter 7 - (Version 4.1)

1. A client is communicating with a server on a different segment of the network. How does the server determine what service is being requested by the client?
*identifies the appropriate service from the destination port field

2. What is the function of the TCP three-way handshake?
*It synchronizes both ends of a connection by allowing both sides to agree upon initial sequence numbers.

3. What are three unique characteristics of UDP? (Choose three.)
*low overhead
*no flow control
*no error-recovery function

4. Within TCP, what combination makes up a socket pair?
*source IP address and port with a destination IP address and port

5. What type of update allows client computers to register and update their resource records with a DNS server whenever changes occur?

6. Which DNS zone resolves an IP address to a qualified domain name?
*reverse lookup

7. Which two tasks are the responsibility of the local DNS server? (Choose two.)
*mapping name-to-IP addresses for internal hosts
*forwarding name resolution requests to a caching-only server

8. Which protocol is used to send e-mail, either from a client to a server or from a server to another server?

9. A manufacturing company subscribes to certain hosted services from their ISP. The services required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)

10. To meet customer expectations, an ISP must guarantee a level of service that is based on what two factors? (Choose two.)

11. Which two statements are true about the OSI and TCP/IP models? (Choose two.)
*The OSI network layer is comparable to the Internet layer of the TCP/IP model.
*The TCP/IP model is based on four layers and the OSI model is based on seven layers.

12. What type of DNS server is typically maintained by an ISP?

13. Which two options correctly match protocol and well-known port number? (Choose two.)
*HTTP - 80
*SMTP - 25

14. What are three characteristics of HTTPS? (Choose three.)
*It supports authentication.
*It encrypts packets with SSL.
*It requires additional server processing time.

15. User1 is sending an e-mail to User2@cisco.com. What are two characteristics of the process of sending this data? (Choose two.)
*It utilizes a store and forward process.
*SMTP is used to send the e-mail message to the mail servers.

16. Which three fields do a TCP header and a UDP header have in common? (Choose three.)
*source port
*destination port

17. When a host is communicating with multiple applications on the same server at the same time, which two values will likely be the same in all packets for each session? (Choose two.)
*IP address
*MAC address

18. What are three characteristics of network reliability? (Choose three.)
*Redundant hardware provides enhanced reliability.
*Fault tolerance is a measure of reliability.
*The longer the MTBF, the greater the reliability.

19. Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1 has sent a SYN message to begin session establishment. What happens next?
*Host2 sends a SYN-ACK message to Host1.

20. Refer to the exhibit. The PC is requesting HTTP data from the server. What is a valid representation of source and destination sockets for this request?
*Source - ; Destination -

21. Refer to the exhibit. Which two statements are true about this file? (Choose two.)
*The command ping fileserv will use IP address
*If the ping www.cisco.com command is issued, the file will be checked for the Cisco web server IP address.


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