MULTICHOICE Căng cực nhất 2025

8. Which three fields are used in a UDP segment header? (Choose three.)

• • Window Size

• • Length

• Source Port

• • Checksum

• • Sequence Number

What are two roles of the transport layer in data communication on a network? (Choose two.)

• • providing the interface between applications and the underlying network over which messages are transmitted

• • identifying the proper application for each communication stream

• • tracking the individual communication between applications on the source and destination hosts

• • providing frame delimiting to identify bits making up a frame

• • performing a cyclic redundancy check on the frame for errors

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

• • Received data is unacknowledged.

• • Destination devices receive traffic with minimal delay.

• • Transmitted data segments are tracked.

• • Destination devices reassemble messages and pass them to an application.

• • Unacknowledged data packets are retransmitted.

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

• • SMTP

• • HTTP

• • FTP

• • SNMP

• • TFTP

19. Which three statements characterize UDP? (Choose three.)

• • UDP provides basic connectionless transport layer functions.

• • UDP relies on application layer protocols for error detection.

• • UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.

• • UDP provides connection-oriented, fast transport of data at Layer 3.

• • UDP relies on IP for error detection and recovery.

20. Which two fields are included in the TCP header but not in the UDP header? (Choose two.)

• • window

• • source port

• • sequence number

• • destination port

• • checksum

23. Which two types of applications are best suited for UDP? (Choose two.)

• • applications that handle reliability themselves

• • applications that need the reordering of segments

• • applications that require reliable delivery

• • applications that can tolerate some data loss, but require little or no delay

• • applications that need data flow control

25. In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two.)

• when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated

• • when a faster delivery mechanism is needed

• • when delivery overhead is not an issue

• • when destination port numbers are dynamic

• • when applications do not need to guarantee delivery of the data

26. What are three responsibilities of the transport layer? (Choose three.)

• • formatting data into a compatible form for receipt by the destination devices

• • meeting the reliability requirements of applications, if any

• • identifying the applications and services on the client and server that should handle transmitted data

• • multiplexing multiple communication streams from many users or applications on the same network

• • directing packets towards the destination network

27. Which three statements describe a DHCP Discover message? (Choose three.)

• • The destination IP address is 255.255.255.255.

• • All hosts receive the message, but only a DHCP server replies.

• • The message comes from a client seeking an IP address.

• • The message comes from a server offering an IP address.

• • The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).