N10-009 Questions Bank

Comprehensive and Detailed Explanation:

VXLAN (Virtual Extensible LAN)encapsulates Ethernet frames inside UDP packets, increasing packet size. This can lead tofragmentation and performance degradationunlessJumbo Framesare enabled.

Breakdown of Options:

A. 802.1Q tagging– VLAN tagging enables segmentation but doesnot address fragmentation issues.

B. Spanning tree– STP prevents loops but doesnot improve performancefor VXLAN traffic.

C. Link aggregation– LACP combines links forhigher bandwidthbut doesnot prevent fragmentation.

D. Jumbo frames–Correct answer.EnablingJumbo Framesallows larger packet sizes,reducing fragmentationandimproving VXLAN performance.

In a data center that uses hot aisle/cold aisle ventilation, equipment is typically installed so that cool air enters from the cold aisle (front) and hot air is exhausted to the hot aisle (rear). This configuration maximizes cooling efficiency.

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)

Console Access:

Purpose: Console access to a switch allows administrators to configure and manage the device directly. This is typically done using a terminal emulator program on a computer.

RJ45 Connector:

Common Use: The RJ45 connector is widely used for Ethernet cables and also for console connections to network devices like switches and routers.

Console Cables: Console cables often have an RJ45 connector on one end (for the switch) and a DB9 serial connector on the other end (for the computer).

Comparison with Other Connectors:

ST (Straight Tip): A fiber optic connector used for networking, not for console access.

BNC (Bayonet Neill-Concelman): A connector used for coaxial cable, typically in older network setups and not for console access.

SFP (Small Form-factor Pluggable): A modular transceiver used for network interfaces, not for console access.

Practical Application:

Connection Process: Connect the RJ45 end of the console cable to the console port of the switch. Connect the DB9 end (or USB via adapter) to the computer. Use a terminal emulator (e.g., PuTTY, Tera Term) to access the switch’s command-line interface (CLI).