Why is WEP considered to be too weak for use in most network settings?
What will be an ideal response?
According to many experts, WEP is too weak for use in most network settings for the following reasons:
· Key management is not effective because most networks use a single shared secret key value for each node. Synchronizing key changes is a tedious process, and no key management is defined in the protocol, so keys are seldom changed.
· The initialization vector (IV) is too small, resulting in the recycling of IVs. An attacker can reverse-engineer the RC4 cipher stream and decrypt subsequent packets, or can forge future packets. In 2007, this was accomplished in less than one minute.
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Answer the following statements true (T) or false (F)
1. It is usually much easier to process a large number of items in an array than to process a large number of items that are stored in separate variables. 2. The number of elements in an array is the value of the subscript of the last element in that array. 3. One drawback to the sequential search is that it cannot be used with an array that contains string elements. 4. The term parallel array is a synonym for a two-dimensional array.
Would it be sensible to produce a concurrency control algorithm based on serializability? Give justification for your answer. How is serializability used in standard concurrency control algorithms?
S = [R 1 (Z), R 2 (Y), W 2 (Y), R 3 (Y), R 1 (X), W 1 (X), W 1 (Z), W 3 (Y), R 2 (X), R 1 (Y), W 1 (Y), W 2 (X), R 3 (W), W 3 (W)] where R i (Z)/W i (Z) indicates a read/write by transaction i on data item Z.
In OpenOffice applications, the Help window can be opened by pressing ________ on your computer keyboard
Fill in the blank(s) with correct word
You are helping your friend troubleshoot a problem with his Linux server. You enter a common Linux command and discover it doesn’t work exactly as you expected. What might be the problem and what do you do next?
a. The Linux installation is corrupted; restore the system from backup. b. The Linux shell is not the one you expected; use the echo $SHELL command. c. You probably don't know how to use the Linux command; search the web for information about the command. d. The Linux shell is not the one you expected; use the echo $0 command.