Two Circumstances That Can Cause Collision Domain Issues on VLAN Domain

AC

Collision Domains -

A collision domain is an area of a single LAN where end stations contend for access to the network because all end stations are connected to a shared physical medium. If two connected devices transmit onto the media at the same time, a collision occurs. When a collision occurs, a JAM signal is sent on the network, indicating that a collision has occurred and that devices should ignore any fragmented data associated with the collision. Both sending devices back off sending their data for a random amount and then try again if the medium is free for transmission. Therefore, collisions effectively delay transmission of data, lowering the effective throughput available to a device. The more devices that are attached to a collision domain, the greater the chances of collisions; this results in lower bandwidth and performance for each device attached to the collision domain. Bridges and switches terminate the physical signal path of a collision domain, allowing you to segment separate collision domains, breaking them up into multiple smaller pieces to provide more bandwidth per user within the new collision domains formed.

A collision domain is a network segment where data packets can collide with each other due to multiple devices sharing the same communication medium. VLANs (Virtual Local Area Networks) allow networks to be segmented into multiple virtual LANs, each with its own broadcast domain, which isolates traffic within that VLAN. However, certain issues can cause collision domain problems in VLANs.

The two circumstances that can cause collision domain issues on a VLAN domain are:

1. Duplex mismatches on Ethernet segments in the same VLAN:

Ethernet networks operate in two duplex modes: half-duplex and full-duplex. In half-duplex mode, devices can either send or receive data at any given time, but not both simultaneously. Full-duplex mode allows devices to transmit and receive data at the same time. Duplex mismatches occur when one device operates in half-duplex mode while the other operates in full-duplex mode. This can cause collisions in the VLAN, leading to performance issues and network congestion.

2. Overloaded shared segment:

A shared segment is a communication medium where multiple devices share the same bandwidth. When too many devices are connected to a shared segment, the available bandwidth is divided among all devices, causing slow network performance and congestion. This can cause collisions in the VLAN, leading to a decrease in network performance.

The other options given in the question are not related to collision domain issues on VLAN domains:

• Multiple errors on switchport interfaces: This could be due to a variety of issues, such as cable faults, hardware faults, or configuration errors. However, it does not necessarily cause collision domain issues on VLAN domains.
• Congestion on the switch inband path: Congestion on the switch inband path can cause packet loss and delay, but it does not necessarily cause collision domain issues on VLAN domains.
• A failing NIC in an end device: A failing NIC in an end device can cause connectivity issues, but it does not necessarily cause collision domain issues on VLAN domains.