I. Multiple choices Choose ONLY 1 Answer (2 point each, 20 points total)

1. A major difference between amplifiers and repeaters is: A. amplifiers forward noise as well as data **** B. amplifiers clean the signal and then forward it C. amplifiers increase the amount of attenuation D. amplifiers focus primarily on digital signals

2. Choose the one that is NOT included in the four components of Domain Name System. A. DNS database B. IP addresses C. name servers D. resolvers

3. The IPv6 specification uses addresses to identify hosts that consist of: A. 16 bits B. 64 bits C. 32 bits D. 128 bits

4. The ________ layer is responsible for the data exchange between a computer and a connected network. A. transport B. application C. network access **** D. physical

5. In a ________ processing configuration, the application processing is performed in an optimized fashion, taking advantage of the strengths of both client and server machines and of the distribution of data. A. host-based B. server-based C. client-based D. cooperative

6. A common method for encapsulating communication in a distributed system is the __________. A. SQL B. PaaS C. RPC D. API

7. Which statement about SMTP message handling is correct? A. Messages typically are sent through multiple SMTP systems while going from the sender to the recipient B. SMTP sender remains responsible for a message until it has been delivered to the recipient C. SMTP does not guarantee that all messages are delivered D. SMTP attempts to send messages until the recipients become available

8. Which type of intermediate devices can be used in an HTTP network? A. proxies B. gateways C. tunnels D. all of the above

9. Circuit switching uses three phases for data communication, which are: A. connect, transfer, hang-up B. ring, talk, hang-up C. dial, transfer, disconnect D. establishment, data transfer, disconnect

10. A public telecommunications network has four generic components: A. senders, receivers, lines, and nodes B. subscribers, local loops, exchanges, and trunks C. subscribers, trunks, nodes, and loops D. local loops, subscriber lines, exchanges, and trunks II.