CompTIA Network+ Practice Test

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Study for the CompTIA Network+ Exam. Enhance your skills with flashcards and multiple choice questions, each with explanations. Prepare effectively for your certification exam!

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Which protocol is known for having no built-in encryption and is often used to create a tunnel between endpoints?

SNMP
GRE
SIP
ICMP

The correct answer is: GRE

The protocol recognized for lacking built-in encryption and commonly used to establish a tunnel between endpoints is GRE (Generic Routing Encapsulation). GRE is a tunneling protocol developed by Cisco that encapsulates a wide variety of network layer protocols. It allows for the creation of a virtual point-to-point link to route packets from one network node to another, effectively creating a tunnel. Despite its utility in encapsulation and tunneling, GRE does not provide any native security features such as encryption or authentication, which can lead to vulnerabilities if sensitive data is transmitted without additional protective measures. Therefore, when utilizing GRE for tunneling purposes, it is often paired with other protocols like IPsec to ensure that the data being tunneled is secure. Other options listed serve different purposes; SNMP is focused on network management, SIP handles multimedia communication sessions, and ICMP is primarily used for sending error messages and operational information relevant to IP processing. None of these options are designed for tunneling purposes as GRE is.