CompTIA Updated N10-009 Exam Questions and Answers by hadi

An incorrect pinout on the patch cable could prevent network connectivity due to mismatched wiring. Even if the cables are the correct length and type, a pinout issue can cause continuity problems and prevent data transmission. Proper crimping with the correct pinout is essential for network cables to function. (Reference: CompTIA Network+ Study Guide, Chapter on Network Media and Topologies)

SNMPv3 is the version of the Simple Network Management Protocol that introduces security enhancements, including message integrity, authentication, and encryption. Unlike previous versions (v1 and v2c), SNMPv3 supports encrypted communication, ensuring that data is not transmitted in plaintext. This provides confidentiality and protects against eavesdropping and unauthorized access.References: CompTIA Network+ study materials.

Understanding Switches:

Layer 2 (Data Link Layer): Traditional switches operate primarily at Layer 2, where they use MAC addresses to forward frames within a local network.

Layer 3 (Network Layer): Layer 3 switches, also known as multilayer switches, can perform routing functions using IP addresses to forward packets between different networks.

Capabilities of Multilayer Switches:

VLANs and Inter-VLAN Routing: Multilayer switches can handle VLAN (Virtual Local Area Network) configurations and perform inter-VLAN routing, enabling communication between different VLANs.

Routing Protocols: They can run routing protocols like OSPF (Open Shortest Path First) and EIGRP (Enhanced Interior Gateway Routing Protocol) to manage traffic between networks.

Comparison with Other Devices:

Hub: Operates only at Layer 1 (Physical Layer) and simply repeats incoming signals to all ports.

Transceiver: Also operates at Layer 1, converting electrical signals to optical signals and vice versa.

Modem: Primarily operates at Layer 1 and Layer 2, modulating and demodulating signals for transmission over different types of media.

Practical Application:

Multilayer switches are commonly used in enterprise networks to optimize performance and manage complex routing and switching requirements within a single device.

Comprehensive and Detailed Explanation:

IPSec (Internet Protocol Security)is the best choice forsecure communication over the internet, as it providesencryption, authentication, and data integrity. It is widely used inVPNs and site-to-site secure tunnels.

Breakdown of Options:

A. DCI (Data Center Interconnect)– A general term forlinking data centers, but it doesn’t specify asecure tunneling protocol.

B. GRE (Generic Routing Encapsulation)– Encapsulates traffic butlacks encryption, making itless secure than IPSec.

C. VXLAN (Virtual Extensible LAN)– Used forLayer 2 network overlays,not for securing communication over the internet.

D. IPSec–✅Correct answer.Providesencryption, authentication, and integrityfor data over the internet.