Exam N10-008 topic 1 question 64 discussion

STP (Spanning Tree Protocol) A switching protocol that prevents network loops by dynamically disabling links as needed.

STP protects against loops caused by redundant links. Question has nothing to do with flow control.

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To prevent network stability issues when configuring redundant network links between switches, the engineer should enable: B. STP (Spanning Tree Protocol) STP is a protocol used to prevent loops in Ethernet networks by dynamically disabling redundant links. When multiple links exist between switches for redundancy, STP identifies and blocks redundant paths, ensuring that only one path is active at a time. This prevents loops from forming and causing broadcast storms or other network stability issues. Therefore, enabling STP is essential for ensuring network stability in redundant network link configurations.

STP should be enabled by default on the routers, also “prevent stability” sounds like the engineer is purposely trying to cluster#### the whole network.

The Spanning Tree Protocol (STP) is a network protocol that builds a logical loop-free topology for Ethernet networks. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them. If you have redundant links set up, it is important to utilize STP to prevent loops within the network. If a loop occurs, the performance of the entire network can be degraded due to broadcast storms. Port mirroring is used on a network switch to send a copy of network packets seen on one switch port to a network monitoring connection on another switch port. Dynamic ARP Inspection (DAI) is a security feature that validates Address Resolution Protocol (ARP) packets in a network. DAI allows a network administrator to intercept, log, and discard ARP packets with invalid MAC address to IP address bindings. A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). Port mirroring, ARP inspection, and VLANs do not add any redundancy to the network.

Just adding this here for people like me who forgot what 802.1Q was: IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual local area networking (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames. The standard also contains provisions for a quality-of-service prioritization scheme commonly known as IEEE 802.1p and defines the Generic Attribute Registration Protocol.

BTW STP (802.11w) is already enabled in modern switches!

The engineer should enable Link Aggregation Control Protocol (LACP) or Spanning Tree Protocol (STP) to prevent network stability issues when configuring redundant network links between switches. LACP allows multiple physical links to be grouped together to form a single logical link, providing increased bandwidth and redundancy. STP helps prevent loops in the network by actively blocking redundant paths and only forwarding traffic on the best path, ensuring network stability and avoiding broadcast storms.

B. STP (Spanning Tree Protocol) is the correct answer as it helps prevent network stability issues in a redundant network configuration.

Spanning Tree Protocol protects packet looping.