Which of the following can be used to maintain data related to the user during navigation, possibly across multiple visits?

Question

Options

• AWeb caching
• BCPU cache
• CCookie
• DAccess control list

• A
  16% (8)
• B
  4% (2)
• C
  71% (35)
• D
  8% (4)

Explanation

Cookie can be used to maintain data related to the user during navigation, possibly across multiple visits. Cookie is a block of data, which a Web server stores on the client computer. If no expiration date is set for the cookie, it expires when the browser closes. If the expiration date is set for a future date, the cookie will be stored on the client's disk after the session ends. If the expiration date is set for a past date, the cookie is deleted. Answer option D is incorrect. Access Control List (ACL) is the most commonly used object in Cisco IOS. It filters packets or network traffic by controlling whether routed packets are forwarded or blocked at the router's interfaces. According to the criteria specified within the access lists, router determines whether the packets to be forwarded or dropped. Access control list criteria could be the source or destination address of the traffic or other information. The types of Cisco ACLs are Standard IP, Extended IP, IPX, Appletalk, etc. Answer option A is incorrect. Web caching is a method for minimizing performance bottlenecks and reducing network traffic by serving locally cached Web content. Web caching helps in reducing bandwidth utilization during periods of high network traffic. High network traffic is usually caused when a large number of users use the network at the same time. With a caching solution in place, users' requests will be returned from the cache without having to travel over a WAN link to the destination Web server. Answer option B is incorrect. A CPU cache is a smaller faster memory used by the central processing unit of a computer to reduce the average time to access memory. It stores copies of the data from the most frequently used main memory locations. When the processor needs to read from or write to a location in main memory, it first checks whether a copy of that data is in the cache. If so, the processor immediately reads from or writes to the cache, which is much faster than reading from or writing to main memory.

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