TCP vs UDP

Question 1

Stands for?

Answer 1

TCP - Transmission Control Protocol

UDP - User Datagram Protocol

Question 2

Connection

Answer 2

TCP - connection-oriented

UDP- connectionless

Question 3

Function

Answer 3

TCP - establishes connection, then sends 1 message at a time

UDP - one program can send a bunch of packets to another, –> end of relationship

Question 4

Usage

Answer 4

TCP - high reliability, less concern with transmission time

UDP - fast, efficient transmission (i.e. games). Servers that answer small queries from a bunch of clients

Question 5

Examples

Answer 5

TCP -
HTTP, FTP, SMTP, Telnet

UDP -
DNS, SNMP

Question 6

ORdering of data packets

Answer 6

TCP - rearranges data packets in specified order

UDP - no order, all packets are independent of each other.
Ordering done by application layer

Question 7

speed of transfer

Answer 7

TCP - slower

UDP - fast, b/c no error checking

Question 8

Reliability

Answer 8

TCP - absolute guarantee that data is received intact and arrives in order

UDP - no guarantee that packets sent will be received at all

Question 9

Header size

Answer 9

TCP - 20 bytes

UDP - 8 bytes

Question 10

Streaming of data

Answer 10

TCP - Data is read as byte stream. Receiver has no indication of segment boundaries

UDP - Packets sent individually, definite boundaries, and checked for integrity only if they arrive

Question 11

weight

Answer 11

TCP - heavy weight. Requires 3 set-up packets before any user data is sent.
Handles reliability and congestion control

UDP - lightweight. no ordering of messages, no tracking connections

Question 12

data flow control

Answer 12

TCP - yes.

UDP - no

Question 13

Error checking

Answer 13

TCP - yes, with recovery

UDP - yes, but no recovery options

Question 14

Acknowledgement

Answer 14

TCP - yes

UDP - no

Question 15

Handshake

Answer 15

TCP -
SYN, SYN-ACK, ACK

UDP- none (connectionless)