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      Question

      What is 'BGP' (Border Gateway Protocol) and where is it

      used?
      A A protocol for assigning IP addresses within a LAN Correct Answer Incorrect Answer
      B A protocol for monitoring network device health and performance Correct Answer Incorrect Answer
      C A protocol for encrypting data between two network endpoints Correct Answer Incorrect Answer
      D A wireless networking standard for long-range communications Correct Answer Incorrect Answer
      E The routing protocol of the internet, used by ISPs and large enterprises Correct Answer Incorrect Answer

      Solution

      BGP is an exterior gateway protocol (path-vector routing) that determines how data is routed across the internet between autonomous systems (e.g., ISPs, large enterprises). Each AS has a unique AS Number (ASN). BGP selects paths based on policies and attributes (AS path, local preference, MED). BGP hijacking is a serious security threat where an AS falsely announces ownership of IP prefixes, potentially redirecting bank traffic. Large banks with their own internet presence manage BGP with their ISPs.

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