1. Refer to the exhibit. Which two statements are true about this file? (Choose two.)
- If the gateway address changes, the file will be updated dynamically.
- The command ping fileserv will use IP address 172.16.5.10.
- If the ping www.cisco.com command is issued, the file will be checked for the Cisco web server IP address before DNS is queried.
- The file must be created by the user if it is to be used by a workstation.
- Name to IP address mappings are added to the file after they are received from DNS.
2. To meet customer expectations, an ISP must guarantee a level of service that is based on what two factors? (Choose two.)
- accessibility
- adaptability
- availability
- reliability
- scalability
3. User1 is sending an e-mail to [email protected]. What are two characteristics of the process of sending this data? (Choose two.)
- It utilizes TCP port 110.
- A TCP connection is established directly between the User1 and User2 client computers in order to send the e-mail message.
- It utilizes a store and forward process.
- The same application layer protocol is used to send the e-mail and retrieve it from the destination server.
- SMTP is used to send the e-mail message to the mail servers.
4. 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?
- Host1 sends an ACK message to Host2.
- Host1 sends a SYN message to Host2.
- Host1 sends a SYN-ACK message to Host2.
- Host2 sends an ACK message to Host1.
- Host2 sends a SYN message to Host1.
- Host2 sends a SYN-ACK message to Host1.
5. What are three characteristics of network reliability? (Choose three.)
- Redundant hardware provides enhanced reliability.
- Reliability is measured as a percent.
- Reliability is the responsibility of the ISP customers.
- Fault tolerance is a measure of reliability.
- The longer the MTBF, the greater the reliability.
6. Which two statements describe the FTP protocol? (Choose two.)
- It uses well-known port 23.
- The protocol interpreter is responsible for the data transfer function.
- In passive data connections, the FTP client initiates the transfer of data.
- It requires two connections between client and server.
- FTP servers open a well-known port on the client machine.
7. What is the function of the TCP three-way handshake?
- It enables the synchronization of port numbers between source and destination hosts.
- It immediately triggers the retransmission of lost data.
- It synchronizes both ends of a connection by allowing both sides to agree upon initial sequence numbers.
- It identifies the destination application on the receiving host.
8. What are three characteristics of HTTPS? (Choose three.)
- It uses a different client request-server response process than HTTP uses.
- It specifies additional rules for passing data between the application and data link layers.
- It supports authentication.
- It allows more simultaneous connections than HTTP allows.
- It encrypts packets with SSL.
- It requires additional server processing time.
9. Which DNS zone resolves an IP address to a qualified domain name?
- dynamic lookup
- forward lookup
- resolution lookup
- reverse lookup
10. What type of update allows client computers to register and update their resource records with a DNS server whenever changes occur?
- dynamic
- zone transfer
- local recursive query
- root domain query
- top-level domain query
11. Which two statements are true about the OSI and TCP/IP models? (Choose two.)
- The two bottom layers of the TCP/IP model make up the bottom layer of the OSI model.
- The TCP/IP model is a theoretical model and the OSI model is based on actual protocols.
- The OSI network layer is comparable to the Internet layer of the TCP/IP model.
- The TCP/IP model specifies protocols for the physical network interconnection.
- The TCP/IP model is based on four layers and the OSI model is based on seven layers.
12. Which two tasks are the responsibility of the local DNS server? (Choose two.)
- maintaining a large number of cached DNS entries
- maintaining the ISP server
- mapping name-to-IP addresses for internal hosts
- forwarding name resolution requests to a caching-only server
- forwarding all name resolution requests to root servers on the Internet
13. What are three unique characteristics of UDP? (Choose three.)
- connection oriented
- full-duplex operation
- low overhead
- no flow control
- no error-recovery function
- reliable transmission
14. A manufacturing company is looking into subscribing to services from a new ISP. The company requires hosted world wide web, file transfer, and e-mail services. Which three protocols represent the key application services that are required by the company? (Choose three.)
- FTP
- HTTP
- ICMP
- PPP
- Telnet
- SMTP
15. Which two options correctly match protocol and well-known port number? (Choose two.)
- DNS – 25
- FTP – 110
- HTTP – 80
- POP3 – 25
- SMTP – 25
16. Within TCP, what combination makes up a socket pair?
- source port with destination port
- source IP address with destination port
- source IP address and destination IP address
- source IP address and port with a destination IP address and port
17. Which protocol is used to send e-mail, either from a client to a server or from a server to another server?
- SNMP
- FTP
- SMTP
- HTTPS
18. 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 – 192.168.1.17:80 ; Destination – 192.168.2.39:80
- Source – 192.168.1.17:80 ; Destination – 192.168.2.39:1045
- Source – 192.168.1.17:1045 ; Destination – 192.168.2.39:80
- Source – 192.168.1.17:1045 ; Destination – 192.168.2.39:1061
19. What type of DNS server is typically maintained by an ISP?
- caching-only
- root
- second-level
- top-level
20. 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?
- The server will apply the default service configured in directory services.
- The server will use ARP to discover the appropriate service from the local router.
- The server will send a request to the client asking for the appropriate service.
- The server will determine the appropriate service from the destination port field.
21. When a host is communicating with multiple applications on the same server at the same time, which of the following will have the same value for each session? (Choose two.)
- IP address
- MAC address
- session number
- sequence number