Which service listed below, if blocked, can help in preventing Denial of Service attack?

exams 212-89 212-89 exam 0 Comments

The network perimeter should be configured in such a way that it denies all incoming and outgoing traffic/ services that are not required.

Which service listed below, if blocked, can help in preventing Denial of Service attack?
A . SAM service
B . POP3 service
C . SMTP service
D . Echo service

Answer: D