N10-009 Network Implementation Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  IPsec

  Why this is correct

  IPsec (Internet Protocol Security) is the industry standard for establishing secure site-to-site VPNs, making it the optimal choice for connecting a new branch office to a main office. It operates at the network layer (Layer 3) and provides robust security through cryptographic protocols for data authentication, integrity, and confidentiality. Key components like Authentication Header (AH) and Encapsulating Security Payload (ESP) ensure secure data transmission, while Internet Key Exchange (IKE) manages secure key negotiation, establishing a trusted tunnel between VPN gateways.

• ✗

  SSL VPN

  Why it's wrong here

  SSL VPNs are primarily designed for client-to-site remote access, enabling individual users to securely connect to a corporate network, often via a web browser or a lightweight client. Unlike IPsec, which creates a persistent network-layer tunnel between two sites, SSL VPNs typically operate at the application layer over TCP port 443 (HTTPS). This architecture is less efficient and scalable for establishing a permanent, high-performance site-to-site link between two branch offices, making it a suboptimal choice for this specific use case.

  When this WOULD be correct

  A question asking for the best VPN type to provide secure remote access for individual employees from home to a single internal application (e.g., email or a CRM) via a web portal, without requiring full network-layer connectivity.

• ✗

  PPTP

  Why it's wrong here

  Point-to-Point Tunneling Protocol (PPTP) is an outdated VPN protocol known for significant security vulnerabilities, rendering it unsuitable for modern secure site-to-site connections. Its encryption (MPPE) and authentication methods (MS-CHAPv1/v2) have been extensively compromised, making it susceptible to various attacks, including dictionary attacks and brute-force decryption. Due to these critical weaknesses, PPTP is strongly discouraged for any scenario requiring robust data confidentiality and integrity.

  When this WOULD be correct

  A question specifying a legacy system that only supports PPTP, or a scenario where compatibility with older devices is required and security is not a primary concern.

• ✗

  L2TP

  Why it's wrong here

  Layer 2 Tunneling Protocol (L2TP) primarily functions as a tunneling protocol, encapsulating network traffic to traverse an IP network. However, L2TP itself does not provide encryption or strong authentication mechanisms, making it inherently insecure for transmitting sensitive data across an untrusted network like the internet. For secure site-to-site VPNs, L2TP must be paired with IPsec (forming L2TP/IPsec) to add the necessary cryptographic protection, but L2TP alone is insufficient for a secure connection.

  When this WOULD be correct

  L2TP would be correct in a scenario where the question specifies a VPN that must support non-IP networks (e.g., Frame Relay) or when the exam asks for a tunneling protocol that can carry multiple protocols and encryption is handled separately (e.g., L2TP/IPsec).

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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