Exam: 200-301: Cisco Certified Network Associate (CCNA) 0 Likes
How do TCP and UDP differ in the way they guarantee packet delivery? (CCNA 200-301)
How do TCP and UDP differ in the way they guarantee packet delivery?
A) TCP uses retransmissions, acknowledgment, and parity checks, and UDP uses cyclic redundancy checks only.
B) TCP uses two-dimensional parity checks, checksums, and cyclic redundancy checks, and UDP uses retransmissions only.
C) TCP uses checksum, acknowledgements, and retransmissions, and UDP uses checksums only.
D) TCP uses checksum, parity checks, and retransmissions, and UDP uses acknowledgements only.
Solution
Correct answer: C) TCP uses checksum, acknowledgements, and retransmissions, and UDP uses checksums only.
TCP (Transmission Control Protocol) is a connection-oriented protocol that guarantees the delivery of packets through the use of checksums, acknowledgements and retransmissions. This means that TCP verifies the integrity of the data with checksums, waits for acknowledgements of received packets, and retransmits lost or corrupted packets.
UDP (User Datagram Protocol), on the other hand, is a connectionless protocol that offers no delivery guarantees. It uses checksums to verify data integrity, but has no mechanisms for acknowledgements or retransmissions. This makes UDP faster and less reliable than TCP, but also more efficient for applications that can tolerate the loss of some packets, such as streaming video or online games.
Category: Network Fundamentals