problem 1: What do you mean by the term network security? That is, what does network security address?

problem 2: describe how a Public Key Cryptosystem with public (K+) and private (K-) keys can be used for confidential communications and for making sure message integrity.

problem 3: What is the benefit of a Public Key Cryptosystem (PKC) over a symmetric cryptosystem (shared secret key) from the perspective of networking?

problem 4: describe SNMP in about one or two sentences. Also, give an illustration of a management variable.

problem 5: What are RTP and RTCP? Define and in brief describe (in roughly one sentence for each protocol).

problem 6: What are the four pillars of multimedia networking if a new network is to be designed specifically to support multimedia?

problem 7: What is the main purpose of policing in a multimedia network? Name a method that can be used for policing.

problem 8: describe B-ISDN in around one or two sentences (comprise ATM in your description).

problem 9: In brief describe an ATM cell (in roughly one sentence). What is the most significant field in the header?