The well-known port number of the transport layer used by TFTP is ______ .

 The well-known port number of the transport layer used by TFTP is ______ .
A . 67
B . 68
C . 69
D . 53

View Answer

Answer:   C

Explanation:

TCP （ 6 ）：

ftp――20/21

ssh――22

telnet――23

smtp-25 receive mail

pop3-110 send mail

DNS――53

http―― 80

https-443 http security version, add ssl layer below

UDP(17) ：

DNS――53

Bootp――67 server / 68 client (that is dhcp , dhcp is developed based on bootp )

Tftp――69

Snmp――161 / 162 The server listens on port number 161 , the client listens on port number