Describe and illustrate the client-server architecture of one or more major Internet applications (for example the Web, email or netnews).
What will be an ideal response?
Browsers are clients of Domain Name Servers (DNS) and web servers (HTTP). Some intranets are configured to interpose a Proxy server. Proxy servers fulfil several purposes – when they are located at the same site as the client, they reduce network delays and network traffic. When they are at the same site as the server, they form a security checkpoint and they can reduce load on the server.
N.B. DNS servers are also involved in all of the application architectures described below, but they ore omitted from the discussion for clarity.
Sending messages: User Agent (the user’s mail composing program) is a client of a local SMTP server and passes each outgoing message to the SMTP server for delivery. The local SMTP server uses mail routing tables to determine a route for each message and then forwards the message to the next SMTP server on the chosen route. Each SMTP s
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a. default VLAN b. native VLAN c. data VLAN d. management VLAN
Which of the following member function do all the sequential containers (vector, list, deque) have? In the explanation, tell what the member does/returns.
a. begin() b. end() c. rbegin() d. rend() e. push_front() f. pushback() g. front() h) back()