How quickly are OSPF messages sent after the cable is disconnected?
What will be an ideal response?
Within couple of seconds. One or two flooding OSPF message (router-LS, network-LS) are sent out from Router4 to all OSPF router through its entire interface. This flooding message arrives in each neighbor router and each router makes a decision and repackages the LSA within a new link state update packet, and sends it out all interfaces except the out that received the LSA in the first place. This procedure then iterated until all routers have the updated LSA. In order to achieve reliability, a router will periodically retransmit an LSA sent to a neighbor until the neighbor acknowledges receipt of the LSA by sending a Link State Acknowledgement packet listing the updated LSA’s link-stat header.
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Internet service providers use e-mail ____ techniques to verify that e-mail messages originate from the Internet domain from which they claim to have been sent.
A. firewall B. authentication C. concatenation D. recovery
Files in the Recycle Bin can be restored or permanently deleted
Indicate whether the statement is true or false
Which of the following statements about the append mode is false?
A. A file opened in the append mode may be read from or written to. B. The file is initially opened in the write state. C. If the file does not exist, an error is returned. D. The file marker is positioned at the end of the file.
Briefly describe the purpose of a Registry cleaner, such as the Eusing utility described in the chapter.
What will be an ideal response?