What is the Internet backbone? Describe how routers work with the Internet backbone.
What will be an ideal response?
The Internet communication backbone is an interconnected network of backbones owned by businesses or NSPs. Much like an anatomical backbone, where nerve signals travel across the spinal cord, an Internet backbone provides a conduit for network communication between different points of Internet access.
Routers direct network traffic to its destination via routing tables and updates from routing protocols. Routers in NSP backbones differ from routers in a LAN by the high amount of traffic they are designed to handle and the routing protocols they use for the Internet backbone environment. The physical memory, CPU speeds, interfaces, and operating systems
(OSs) of routers used in NSP backbones can support enormous amounts of traffic and large
routing tables.
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Suggest a technique by which a browser could detect and block clickjacking attacks
What will be an ideal response?
Which of the following statements is true?
a) If the return value of function scanf matches the number of items that should have been input, then all the inputs are valid. b) Even if a scanf operates successfully, the values read might still be invalid. c) When a program expects to receive input values in a specific range, you should peform range checking on the inputs to ensure that the values received are indeed in that range (e.g., in a program that expects grades in the range 0-100, you should check that every grade is in that range). d) Both b) and c).