Which three statements are characteristics of generic routing encapsulation (GRE)? (Choose three.)

IT Questions BankCategory: CCNAWhich three statements are characteristics of generic routing encapsulation (GRE)? (Choose three.)

Which three statements are characteristics of generic routing encapsulation (GRE)? (Choose three.)

  • GRE does not have strong security mechanisms.
  • The GRE header alone adds at least 24 bytes of overhead.
  • GRE is stateless.
  • GRE encapsulation supports any OSI Layer 3 protocol.
  • GRE is the most secure tunneling protocol.
  • GRE provides flow control by default.

Explanation: GRE uses a protocol type field in the GRE header to support the encapsulation of any OSI Layer 3 protocol. GRE itself is stateless; it does not include any flow-control mechanisms by default. GRE does not have strong security mechanisms.

Exam with this question: CCNA 4 Chapter 3 Exam Answers


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