CCNA1 Chapter 9 Exam & Answer

Soal Beserta jawaban Latihan CCNA 1

CHAPTER 9

STMIK Nusa Mandiri Jakarta

1. A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

1000 segments

100 segments

10 segments

1 segment

2. What is the complete range of TCP and UDP well-known ports?

256 - 1023

0 to 1023

1024 - 49151

0 to 255

3. During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?

the total number of bytes that have been received

one number more than the sequence number

the next byte that the destination expects to receive

the last sequence number that was sent by the source

4. Which factor determines TCP window size?

the amount of data to be transmitted

the number of services included in the TCP segment

the amount of data the source is capable of sending at one time

the amount of data the destination can process at one time

5. Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

ACK

URG

PSH

FIN

RST

SYN

6. 

The exhibit shows a network topology with a PC, a web server, 2 layer 2 switches, and 2 routes. The PC (IP address 192.168.1.2) is connected to the 1st switch. The 1st switch is connected to the Fa0/0 of R1 (IP address 192.168.1.1). The S0/0/0 of R1 (IP address 192.168.0.1) is connected to the S0/0/0 of R2 (IP address 192.168.0.2). The Fa0/0 of R2 (IP address 192.168.2.1) is connected to the 2nd switch. The 2nd switch is connected to the web server (IP address 192.168.2.2).

Option 4: source port number. Press spacebar to enter matching mode. 

Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.)

192.168.1.1

  

192.168.1.2

source IP address

192.168.2.2

destination IP address

25

  

2578

source port number

80

destination port number

 

7. What is a characteristic of a TCP server process?

There can be many ports open simultaneously on a server, one for each active server application.

An individual server can have two services assigned to the same port number within the same transport layer services.

A host running two different applications can have both configured to use the same server port.

Every application process running on the server has to be configured to use a dynamic port number.

8. When is UDP preferred to TCP?

when all the data must be fully received before any part of it is considered useful

when an application can tolerate some loss of data during transmission

when segments must arrive in a very specific sequence to be processed successfully

when a client sends a segment to a server

9. What kind of port must be requested from IANA in order to be used with a specific application?

registered port

private port

source port

dynamic port

10. A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?

random static addresses to improve security

addresses from different subnets for redundancy

predictable static IP addresses for easier identification*

dynamic addresses to reduce the probability of duplicate addresses

11. What type of information is included in the transport header?

destination and source port numbers

encoded application data

destination and source physical addresses

destination and source logical addresses

12. Which three application layer protocols use TCP? (Choose three.)

FTP

SNMP

TFTP

DHCP

SMTP

HTTP

13. A host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth?

multiplexing

port numbers

acknowledgments

window size

14. A host device is receiving live streaming video. How does the device account for video data that is lost during transmission?

The device will immediately request a retransmission of the missing data.

The device will use sequence numbers to pause the video stream until the correct data arrives. ​

The device will continue receiving the streaming video, but there may be a momentary disruption.

The device will delay the streaming video until the entire video stream is received.

15. Why does HTTP use TCP as the transport layer protocol?

because transmission errors can be tolerated easily

to ensure the fastest possible download speed

because HTTP is a best-effort protocol

because HTTP requires reliable delivery

16. What information is used by TCP to reassemble and reorder received segments?

port numbers

acknowledgment numbers

fragment numbers

sequence numbers

17. What happens if the first packet of a TFTP transfer is lost?

The transport layer will retry the query if a reply is not received.

The TFTP application will retry the request if a reply is not received.

The next-hop router or the default gateway will provide a reply with an error code.

The client will wait indefinitely for the reply.

18. Which two characteristics are associated with UDP sessions? (Choose two.)

Destination devices reassemble messages and pass them to an application.

Received data is unacknowledged.

Destination devices receive traffic with minimal delay.

Unacknowledged data packets are retransmitted.

Transmitted data segments are tracked.

19. What is a socket?

the combination of a source IP address and port number or a destination IP address and port number

the combination of the source and destination sequence and acknowledgment numbers

the combination of the source and destination sequence numbers and port numbers

the combination of the source and destination IP address and source and destination Ethernet address

20. What does TCP do if the sending source detects network congestion on the path to the destination?

The source will decrease the amount of data that it sends before it must receive acknowledgements from the destination.

The source host will send a request for more frequent acknowledgments to the destination.

The destination will request retransmission of the entire message.

The source will acknowledge the last segment that is sent and include a request for a smaller window size in the message.

21. Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?

FIN

RST

SYN

ACK

22. What happens if part of an FTP message is not delivered to the destination?

The part of the FTP message that was lost is re-sent.

The message is lost because FTP does not use a reliable delivery method.

The FTP source host sends a query to the destination host.

The entire FTP message is re-sent.

23. What does a client do when it has UDP datagrams to send?

It queries the server to see if it is ready to receive data.

It sends a simplified three-way handshake to the server.

It sends to the server a segment with the SYN flag set to synchronize the conversation.

It just sends the datagrams.