Network Security UGC

Question 1

Which of the following statement/s is/are true ?

• (i) Firewall can screen traffic going into or out of an organization.
• (ii) Virtual private networks cam simulate an old leased network to provide certain desirable properties.

Choose the correct answer from the code given below:

• (i) only
• Neither (i) nor (ii)
• Both (i) and (ii)
• (ii) only

Question 2

Consider the Euler’s phi function given by ϕ(n)=nΠp/n(1–1p) where p runs over all the primes dividing n. What is the value of ϕ(45)?

• 3
• 12
• 6
• 24