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12.
Which of the following is NOT a characteristic of the
Media Access Control (MAC) sublayer of the data-link layer
(Layer 2) of the OSI reference layered model?
13.
Which OSI reference model layer is responsible for?
(a) Setting up session
(b) Maintaining a session
(c) Tearing down a session
14.
What layers of the OSI correspond to labels A and B?
15.
John, the Network Administrator of XYZ Corporation,
is interested in changing the format of text from American
Standard Code for Information Interchange (ASCII) to Extended
Binary Code Decimal Interchange Code (EBCDIC). In addition,
his IT manager requested that all sensitive and confidential
information on their servers should be protected by applying the
appropriate encryption. What OSI reference model layer is
responsible for data format such as encryption?
16. What is the purpose of a DNS server?
17. How fast can category 5e transfer data?
18. What is the purpose of a proxy server?
19. What is a virtual server?
20. What is the purpose of RTP in VoIP?
21. Which two types of media are twisted-pair cable?