200-301 Question 55
Select 2Your company has a branch office that needs to securely connect to the main office over the public internet. The IT team decides to implement a WAN solution using IPsec tunnels. Which two protocols or technologies are most commonly used in this scenario to establish secure connections between sites?
- A
MPLS
- B
GRE
- C
IPsec
- D
SSL VPN
- E
Frame Relay
Show answer and explanation
Correct answers: C, D
Explanation
To securely connect the branch office to the main office over the public internet, you need technologies that provide encryption and secure tunneling. IPsec is the most common protocol for creating encrypted site-to-site VPNs, while SSL VPNs are another secure option. MPLS and Frame Relay are private WAN technologies that do not utilize the public internet, and GRE lacks inherent encryption capabilities, making them unsuitable for this specific scenario.
- A. Incorrect.
MPLS (Multiprotocol Label Switching) is a WAN technology that provides private connectivity between sites but does not inherently offer encryption or secure tunnels over the public internet.
- B. Incorrect.
GRE (Generic Routing Encapsulation) is a tunneling protocol that can encapsulate a wide variety of network layer protocols. However, it does not provide encryption or security features by itself.
- C. Correct.
IPsec (Internet Protocol Security) is a widely used protocol suite for securing IP communications through encryption and authentication. It is ideal for creating secure tunnels over the public internet.
- D. Correct.
SSL VPN (Secure Sockets Layer Virtual Private Network) is commonly used for secure remote access and can also be employed for site-to-site secure communications over the internet.
- E. Incorrect.
Frame Relay is an older WAN technology that provides point-to-point connections but does not support encryption or secure tunneling over the public internet.