CCNA Lan Chapter #3

The network administrator should reconfigure switch port Fa0/1 by entering the switchport mode access command in interface configuration mode. This command will configure the port as an access port, allowing it to connect a host to the network. By doing so, the port will no longer function as a trunk port, which is necessary in this scenario.

The command generated an error because VLAN 1 cannot be deleted. VLAN 1 is the default VLAN and is always present on a switch. It is used for management purposes and cannot be removed.

Hosts on different VLANs communicate through routers because VLANs are designed to separate broadcast domains. Each VLAN represents a separate broadcast domain, and by default, hosts within the same VLAN can communicate with each other using Layer 2 switching. However, in order to communicate with hosts in different VLANs, a router is required to route traffic between the VLANs. The router acts as a gateway, allowing communication between hosts on different VLANs by forwarding traffic between the VLANs based on their IP addresses.

The switch port modes that will allow a switch to successfully form a trunking link if the neighboring switch port is in "dynamic desirable" mode are on, auto, or dynamic desirable mode. In "dynamic desirable" mode, the switch port actively tries to negotiate a trunking link with the neighboring switch. The "on" mode forces the switch port to be a trunk port, the "auto" mode allows the switch port to negotiate whether to be a trunk or access port, and the "dynamic desirable" mode actively negotiates a trunking link. Therefore, any of these three modes will be compatible with the "dynamic desirable" mode on the neighboring switch port.

PC4 must use the same subnet as the other HR VLAN PCs because in order for devices to communicate with each other, they must be on the same subnet. Since the existing PCs are unable to access shares on PC4, it suggests that they are not on the same subnet. Therefore, PC4 needs to be configured with the appropriate IP address in the 172.17.11.0/24 subnet to ensure proper communication within the HR VLAN.

The switchport mode dynamic desirable command allows the connected devices to dynamically determine when data for multiple VLANs needs to be transmitted across the link and brings the trunk up as needed. This means that if the remote connected device is configured with the switchport mode dynamic auto or switchport mode trunk commands, a trunk link will be formed.

The broadcast frame sent by computer A will only be propagated to computer D and computer G in the LAN domain. This means that only these two computers will receive the broadcast frame.

The most likely cause of the problem is that VLAN 50 is not allowed to enter the trunk between Switch1 and Switch2. This means that the VLAN is not being properly propagated across the switches, causing computer C and computer D to be unable to communicate with computer A.

The most likely cause of the problem is that the trunk cannot be negotiated with both ends set to auto. This means that the switches are not able to automatically establish a trunk connection between them.

A VLAN ID tag will be included with the frame on the links between computer 1 and computer 4 that correspond to switches C and E.

To remove Fast Ethernet port fa0/1 from VLAN 2 and assign it to VLAN 3, the network administrator should enter the "switchport access vlan 3" command in interface configuration mode. This command configures the port to belong to VLAN 3, effectively removing it from VLAN 2 and assigning it to the new VLAN.

In a default switch configuration, VLAN 1 is the management VLAN, which means it is used for managing the switch. This VLAN is typically used for remote access to the switch, such as through Telnet or SSH. Additionally, all switch ports are members of VLAN 1 by default, meaning that any device connected to the switch will be part of VLAN 1 unless specifically configured otherwise.

Based on the given output, it can be concluded that the command "switchport access vlan 20" was entered in interface configuration mode for Fast Ethernet interface 0/1. This means that VLAN 20 is configured on this switch and any device connected to interface fa0/1 will be a member of VLAN 20. Additionally, it can be inferred that devices connected to ports fa0/5 through fa0/8 cannot communicate with devices connected to ports fa0/9 through fa0/12 without the use of a Layer 3 device. This suggests that these ports are in different VLANs and require a Layer 3 device, such as a router, to enable communication between them.

VLANs improve network security by isolating users that have access to sensitive data and applications. By separating the network into smaller logical networks, VLANs restrict the access of unauthorized users to sensitive information, enhancing security.

VLANs divide a network into smaller logical networks, resulting in lower susceptibility to broadcast storms. By segmenting the network, VLANs limit the scope of broadcast storms, preventing them from affecting the entire network and improving overall network performance and stability.

The network administrator can choose to name the VLANs in Building A. This allows for easier identification and management of the VLANs. Additionally, the network administrator has the flexibility to create the VLANs in either global configuration mode or VLAN database mode. This gives them different options for configuring and managing the VLANs based on their preference and requirements.

Configuring interswitch connections as trunks allows for the transmission of multiple VLANs over a single physical connection. However, if a broadcast storm occurs on any VLAN that is carried by that trunk, it will affect the entire trunk connection, potentially causing network performance issues.

Computer D does not have a proper address for the VLAN 3 address space. This means that computer D is not configured with the correct IP address or subnet mask for the VLAN 3 network. As a result, it is unable to communicate with other devices on that VLAN.

DTP (Dynamic Trunking Protocol) is a Cisco proprietary protocol used to negotiate and establish trunk links between switches. If both switches support DTP, they will automatically negotiate and form a trunk link. Therefore, Interface Fa0/2 on switch SW2 will negotiate to become a trunk link if it supports DTP.

When a VLAN is deleted, the member ports of that VLAN lose their ability to communicate with other ports. Deleting a VLAN removes the virtual network configuration, causing the member ports to lose their association with the VLAN. As a result, communication between the member ports is no longer possible.

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The statement "Trunking can occur with non-Cisco switches" is true concerning interface Fa0/5. This means that the interface is capable of carrying traffic for multiple VLANs using trunking, regardless of whether the connected switch is a Cisco switch or not.