A gigahertz is cycles per second

SUM is an example of a(n) ________

Fill in the blank(s) with correct word

In this chapter we have described sequence numbers between a sender and receiver as a way to protect a communication stream against substitution and replay attacks. Describe a situation in which an attacker can substitute or replay in spite of sequence numbers. For which type of sequence numbering—one general stream of sequence numbers or a separate stream for each pair of communicators—is

this attack effective? What will be an ideal response?