Transport Layer Protocols

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Which layer is responsible for logical communications between applications running on different hosts?

Data link layer
Network layer
Application layer
Transport layer (correct)

Which transport layer protocol is stateful, reliable, acknowledges data, resends lost data, and delivers data in sequenced order?

HTTP
TCP (correct)
UDP
IP

Which transport layer protocol is stateless, fast, has low overhead, does not require acknowledgments, does not resend lost data, and delivers data in the order it arrives?

IP
UDP (correct)
HTTP
TCP

Which layer is responsible for tracking conversations (sessions), segmenting data and reassembling segments, adding header information, identifying applications, and conversation multiplexing?

Transport layer (A) Signup and view all the answers

Which layer adds 20 bytes of overhead as header information when encapsulating the application layer data?

Transport layer (D) Signup and view all the answers

Which transport layer protocol establishes sessions, ensures reliability, provides same-order delivery, and supports flow control?

TCP (C) Signup and view all the answers

Which transport layer protocol reconstructs data in the order it is received, does not resend lost segments, and does not inform the sender of resource availability?

UDP (D) Signup and view all the answers

Which layer is responsible for network transmission?

Network layer (C) Signup and view all the answers

Which layer includes TCP and UDP?

Transport layer (A) Signup and view all the answers

Which layer specifies how to transfer messages between hosts and is responsible for managing reliability requirements of a conversation?

Transport layer (A) Signup and view all the answers

Which layer of the TCP/IP model is responsible for managing multiple simultaneous conversations using port numbers?

Transport layer (D) Signup and view all the answers

What is the range of port numbers available for TCP and UDP protocols?

0 through 65535 (D) Signup and view all the answers

Which of the following is NOT one of the groups into which the range of port numbers is divided?

Public Ports (C) Signup and view all the answers

What utility can be used to verify active TCP connections on a networked host?

Netstat (A) Signup and view all the answers

How many exchanges are needed to terminate a single conversation supported by TCP?

4 (B) Signup and view all the answers

What is the 16-bit field in the TCP header that helps maintain the reliability of TCP transmission by adjusting the rate of data flow between source and destination?

Window size (C) Signup and view all the answers

Which transport layer protocol does not track sequence numbers and does not reorder datagrams into their transmission order?

UDP (D) Signup and view all the answers

What must the application do if the data sequence is important and the application receives UDP datagrams out of order?

Reorder the datagrams (A) Signup and view all the answers

Which layer of the TCP/IP model is responsible for forwarding application data to the appropriate application based on the port number?

Application layer (A) Signup and view all the answers

Which port number does the UDP client process use as the source port for the conversation?

A randomly selected port number (D) Signup and view all the answers

What is the usual destination port for the UDP client process?

The well-known or registered port number (D) Signup and view all the answers

What happens to the source and destination port numbers in the datagram header for the data returning to the client from the server?

They are reversed (B) Signup and view all the answers

What is the purpose of the UDP client process dynamically selecting a port number for the conversation?

To identify the specific conversation (B) Signup and view all the answers

What is the purpose of using the same pair of ports in the header of all datagrams used in the transaction?

To identify the specific conversation (B) Signup and view all the answers

What is the significance of reversing the source and destination port numbers in the datagram header for the data returning to the client from the server?

To correctly route the data back to the client (A) Signup and view all the answers

What is the role of the well-known or registered port number in the UDP client process?

To identify the specific conversation (A) Signup and view all the answers

What happens if the UDP client process selects a port number that is already in use by another client?

The client is unable to establish a connection with the server (B) Signup and view all the answers

Transport layer

The Transport layer is responsible for establishing and managing communication sessions between applications running on different hosts. It ensures data delivery and handles reliability concerns.

TCP

TCP is a connection-oriented protocol that guarantees reliable, ordered data delivery. It uses acknowledgements, sequencing, and retransmission to ensure data integrity.

UDP

UDP is a connectionless protocol that is faster and less resource-intensive than TCP. It does not guarantee data delivery order or reliability.

What responsibilities does the Transport layer have?

The Transport layer is responsible for managing sessions, segmenting and reassembling data, adding header information, identifying applications, and enabling multiple conversations.