CCNA Exploration 1: Network Fundamentals – Chapter 4 Exam

01.

Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)

• This is a UDP header.
• This contains a Telnet request.
• This contains a TFTP data transfer.
• The return packet from this remote host will have an Acknowledgement Number of 43693.
• This is a TCP header.

02. With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?

• 0 to 255
• 256 to 1022
• 0 to 1023
• 1024 to 2047
• 49153 to 65535

03. Why are port numbers included in the TCP header of a segment?

• to indicate the correct router interface that should be used to forward a segment
• to identify which switch ports should receive or forward the segment
• to determine which Layer 3 protocol should be used to encapsulate the data
• to enable a receiving host to forward the data to the appropriate application
• to allow the receiving host to assemble the packet in the proper order

04. Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?

• application
• presentation
• session
• transport
• network

05.

Refer to the exhibit. Host A is using FTP to download a large file from Server 1. During the download process, Server 1 does not receive an acknowledgment from Host A for several bytes of transferred data. What action will Server 1 take as a result?

• create a Layer 1 jam signal
• reach a timeout and resend the data that needs to be acknowledged
• send a RESET bit to the host
• change the window size in the Layer 4 header

06. Why is flow control used for TCP data transfer?

• to synchronize equipment speed for sent data
• to synchronize and order sequence numbers so data is sent in complete numerical order
• to prevent the receiver from being overwhelmed by incoming data
• to synchronize window size on the server
• to simplify data transfer to multiple hosts

07. Which two options represent Layer 4 addressing? (Choose two.)

• identifies the destination network
• identifies source and destination hosts
• identifies the communicating applications
• identifies multiple conversations between the hosts
• identifies the devices communicating over the local media

08.

Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?

• session establishment
• segment retransmit
• data transfer
• session disconnect

09.

Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)

• The local host is using three client sessions.
• The local host is using web sessions to a remote server.
• The local host is listening for TCP connections using public addresses.
• The local host is using well-known port numbers to identify the source ports.
• The local host is performing the three-way handshake with 192.168.1.101:1037.

10. What is dynamically selected by the source host when forwarding data?

• destination logical address
• source physical address
• default gateway address
• source port

11. What are two features of the User Datagram Protocol (UDP)? (Choose two.)

• flow control
• low overhead
• connectionless
• connection-oriented
• sequence and acknowledgements

12. What mechanism is used by TCP to provide flow control as segments travel from source to destination?

• sequence numbers
• session establishment
• window size
• acknowledgments

13. Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?

• TCP
• IP
• UDP
• HTTP
• DNS

14. Which information is found in both the TCP and UDP header information?

• sequencing
• flow control
• acknowledgments
• source and destination port

15. Which three features allow TCP to reliably and accurately track the transmission of data from source to destination? (Choose three.)

• flow control
• urgent pointer
• best effort delivery
• session establishment
• connectionless services
• numbering and sequencing

16. During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?

• The packets will not be delivered.
• The packets will be retransmitted from the source.
• The packets will be delivered and reassembled at the destination.
• The packets will be delivered and not reassembled at the destination.

17. Which is an important characteristic of UDP?

• acknowledgement of data delivery
• minimal delays in data delivery
• high reliability of data delivery
• same order data delivery

18. After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server?

• 13
• 53
• 80
• 1024
• 1728

19. Which event occurs during the transport layer three-way handshake?

• The two applications exchange data.
• TCP initializes the sequence numbers for the sessions.
• UDP establishes the maximum number of bytes to be sent.
• The server acknowledges the bytes of data received from the client.

20.

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 a segment with the ACK flag = 0, SYN flag = 0 to Host2.
• Host1 sends a segment with the ACK flag = 1, SYN flag = 0 to Host2.
• Host1 sends a segment with the ACK flag = 1, SYN flag = 1 to Host2.
• Host2 sends a segment with the ACK flag = 0, SYN flag = 1 to Host1.
• Host2 sends a segment with the ACK flag = 1, SYN flag = 0 to Host1.
• Host2 sends a segment with the ACK flag = 1, SYN flag = 1 to Host1.

CCNA Exploration 1: Network Fundamentals – Chapter 3 Exam

01. What application layer protocol is commonly used to support for file transfers between a client and a server?

• HTML
• HTTP
• FTP
• Telnet

02. What are two forms of application layer software? (Choose two.)

• applications
• dialogs
• requests
• services
• syntax

03. A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two.)

• centralized administration
• does not require specialized software
• security is easier to enforce
• lower cost implementation
• provides a single point of failure

04. What is the purpose of resource records in DNS?

• temporarily holds resolved entries
• used by the server to resolve names
• sent by the client to during a query
• passes authentication information between the server and client

05. What is the automated service that matches resource names with the required IP address?

• HTTP
• SSH
• FQDN
• DNS
• Telnet
• SMTP

06. What three protocols operate at the Application layer of the OSI model? (Choose three.)

• ARP
• DNS
• PPP
• SMTP
• POP
• ICMP

07. What are three properties of peer-to-peer applications? (Choose three.)

• acts as both a client and server within the same communication
• requires centralized account administration
• hybrid mode includes a centralized directory of files
• can be used in client-server networks
• requires a direct physical connection between devices
• centralized authentication is required

08. Which application layer protocols correctly match a corresponding function? (Choose two.)

• DNS dynamically allocates IP addresses to hosts
• HTTP transfers data from a web server to a client
• POP delivers email from the client to the server email server
• SMTP supports file sharing
• Telnet provides a virtual connection for remote access

09. Which email components are used to forward mail between servers? (Choose two.)

• MDA
• IMAP
• MTA
• POP
• SMTP
• MUA

10. As compared to SSH, what is the primary disadvantage of telnet?

• not widely available
• does not support encryption
• consumes more network bandwidth
• does not support authentication

11. Which statements are correct concerning the role of the MTA in handling email? (Choose three.)

• routes email to the MDA on other servers
• receives email from the client’s MUA
• receives email via the POP3 protocol
• passes email to the MDA for final delivery
• uses SMTP to route email between servers
• delivers email to clients via the POP3 protocol

12. Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)

• ASP
• FTP
• HTML
• HTTP
• HTTPS
• IP

13. A small home network has been installed to interconnect three computers together for gaming and file sharing. What two properties represent this network type? (Choose two.)

• User accounts are centralized.
• Security is difficult to enforce.
• Specialized operating system software is required.
• File permissions are controlled by a single computer.
• A computer that responds to a file sharing request is functioning as a server.

14. Which layer of the OSI model supplies services that allow user to interface with the network?

• physical
• session
• network
• presentation
• application
• transport

15.
Refer to the exhibit. What is the destination port for the communication that is represented on line 5?

• 80
• 1261
• 15533
• 3912
• 65520

16. What are two characteristics of peer-to-peer networks? (Choose two.)

• scalable
• one way data flow
• decentralized resources
• centralized user accounts
• resource sharing without a dedicated server

17. What application layer protocol describes the services that are used for file sharing in Microsoft networks?

• DHCP
• DNS
• SMB
• SMTP
• Telnet

18. What are two characteristics of clients in data networks? (Choose two.)

• use daemons
• initiate data exchanges
• are repositories of data
• may upload data to servers
• listen for requests from servers

19. What is the role of the OSI application layer?

• provides segmentation of data
• provides encryption and conversion of data
• provides the interface between the applications on either end of the network
• provides control of all the data flowing between the source and destination devices

20. How does the application layer on a server usually process multiple client request for services?

• ceases all connections to the service
• denies multiple connections to a single daemon
• suspends the current connection to allow the new connection
• uses support from lower layer functions to distinguish between connections to the service