CCNA Lan Final Practice

The correct order in which the STP components are chosen is: root bridge, root ports, designated ports, non-designated ports. This sequence follows the logical progression of the STP algorithm. First, the root bridge is determined, which is the central point of the spanning tree. Then, root ports are selected on each non-root bridge, which are the ports that provide the shortest path to the root bridge. After that, designated ports are chosen on each segment, which are the ports that forward traffic towards the root bridge. Finally, non-designated ports are left, which are the ports that are blocked to prevent loops in the network.

To remedy the connectivity issue between users on VLAN 20 on SW1 and SW2, VLAN 20 needs to be included in the list of allowed VLANs on the trunk link on SW2. By doing this, the trunk link will be able to carry traffic for VLAN 20 between the two switches, allowing the users on VLAN 20 to have connectivity with each other.

A wireless access point is used to associate a client computer to a wireless network. It acts as a central hub that allows devices to connect to the network wirelessly. The access point receives signals from the client computer and transmits them to the network, enabling the client to access the internet or other network resources. Unlike an Ethernet switch, which is used for wired connections, a wireless access point specifically facilitates wireless connections. Another wireless computer could potentially connect to the network, but it would not be the device specifically used for association. A hard-wired computer on the network is not used to associate a client computer to the wireless network.

The correct answer is "Switch1# copy running-config startup-config". This command is used to save the configuration file currently in RAM (running-config) to NVRAM (startup-config) before rebooting the switch.

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A wireless NIC (Network Interface Card) must be installed in each computer to allow a wireless connection to be established. This card enables the computer to communicate with wireless networks by transmitting and receiving data wirelessly. It acts as a bridge between the computer and the wireless router or access point, allowing the computer to connect to the network and access the internet or other devices within the network.

Spanning Tree Protocol aids network architecture by allowing for redundant links while eliminating loops. This is achieved by creating a tree-like structure within the network, where only one active path exists between any two network devices. This prevents the formation of loops, which can cause broadcast storms and network congestion. By eliminating loops, the network becomes more reliable and stable, as redundant links can be utilized for backup purposes in case of link failures.

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To access the device and make configuration changes, the user needs to establish a wired connection from a computer in the same IP subnet as the WRT300N. This means that the computer and the device should have IP addresses within the same range. Once the wired connection is established, the user can enter the default IP address of the device into a web browser on the computer. This will allow them to access the device's configuration interface and make the necessary changes, including changing the default administrator password.

The correct answer is to reconfigure the VTP password to be consistent on all VTP switches. This is because the VTP password is used to authenticate and secure VTP messages between switches. If the VTP password is not consistent across all switches, they will not be able to communicate and synchronize their VLAN database information. By ensuring that the VTP password is the same on all switches, the switches will be able to successfully exchange VTP messages and keep their VLAN databases in sync.

The engineer is unable to get a switch prompt because they are using a crossover cable instead of a rollover cable. A rollover cable is specifically designed for connecting a computer to the console port of a switch or router for initial configuration. By replacing the crossover cable with a rollover cable, the engineer will be able to establish a connection and get a switch prompt.

The possible cause of the failure is that Port Fa0/11 is in the wrong VLAN. This means that the computer B is connected to a different VLAN than RTB, causing the communication failure between them.

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The network administrator should modify the transport input command in the displayed configuration to satisfy the requirement. By removing "telnet" from the transport input command and leaving only "ssh", the switch will allow SSH connections and prohibit Telnet connections. This change ensures that only SSH connections are permitted for remote access to the switch.

The password "cisco2" allows the administrator to enter the privileged exec mode.

Frames are forwarded to the correct VLAN based on the VLAN tag. This is because when a frame enters an Ethernet trunk, it is tagged with the VLAN ID. The VLAN tag allows the network devices to identify which VLAN the frame belongs to and ensure that it is forwarded to the correct VLAN. This tagging process helps in maintaining the segregation and isolation of different VLANs within the network.

BPDU stands for Bridge Protocol Data Unit. It is a frame that is used in the election of the spanning tree root bridge. BPDUs are exchanged between bridges in a network to determine the best path for forwarding data and to prevent loops. The BPDU contains information such as bridge ID, priority, and MAC address, which is used to determine the root bridge and the best path for forwarding data in the network.

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After a collision occurs, all hosts involved in the collision will send a jam signal to indicate the collision. Once the jam signal clears, each host will wait for a random backoff delay before attempting to retransmit. In this case, since host D was not involved in the collision, it can immediately transmit its frame without waiting for any other hosts to complete transmission or for the backoff delay to expire.

Designing a network with a small network diameter can result in lower latency. A smaller network diameter means that the distance between any two nodes in the network is shorter. This reduces the time it takes for data to travel between nodes, resulting in lower latency. Lower latency is beneficial as it improves the responsiveness and speed of network communication, making it ideal for real-time applications such as video streaming, online gaming, and VoIP.

Spanning Tree Protocol (STP) is a Layer 2 protocol used to prevent and eliminate loops in network topologies. It accomplishes this by creating a loop-free logical topology and blocking redundant links. STP operates at Layer 2, specifically at the Data Link layer, to ensure that there is only one active path between any two network devices. It is not configured on routers as they operate at Layer 3. STP does not limit the number of valid MAC addresses on a port; this is typically controlled by other mechanisms like MAC address filtering. STP also allows VLAN information to propagate to other switches in the network, ensuring consistent VLAN configurations.

Computer C and Router1 will see the broadcast message sent by Computer A. This is because a broadcast message is sent to all devices on the network, and both Computer C and Router1 are part of the same network as Computer A.

When hosts A and C transmit data at the same time, they both respond by transmitting a jam signal. This signal is sent to inform all hosts on the network that a collision has occurred. Additionally, after a back off period, the host checks if the line is idle before retransmitting. This ensures that the host does not collide with another transmission and helps in avoiding further collisions on the network.

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A channel is a specific frequency at which a wireless access point operates. It is used to avoid interference and ensure smooth communication between devices. Each channel represents a different frequency band, and the access point can be set to operate on a specific channel to establish a wireless network. By selecting the appropriate channel, the access point can optimize its performance and avoid conflicts with other nearby wireless devices.

The most likely cause of the Telnet connections failing is that the transport input command is configured incorrectly. The transport input command determines which protocols are allowed for incoming connections. In this case, if the command is misconfigured and does not include Telnet as an allowed protocol, then Telnet connections will fail. The SSH configuration or version number would not affect Telnet connections. Additionally, it is possible to configure both Telnet and SSH simultaneously, so that is not the cause of the problem.

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When the range of allowed VLANs is set to the default value, all VLANs will be allowed across the trunk. This means that traffic from all VLANs will be able to pass through the trunk link between the switches.

The parameter associated with wireless authentication is the shared key. This is a security measure where both the wireless access point and the client device must have the same pre-shared key in order to authenticate and establish a secure connection. The shared key is used to encrypt and decrypt data transmitted over the wireless network, ensuring that only authorized devices can access the network.

The service password-encryption command encrypts all previously unencrypted passwords in the running configuration. This means that any passwords that were previously stored in clear text format will be encrypted when this command is executed. It does not only encrypt passwords for the console and VTY ports, but rather it encrypts all passwords in the running configuration. To view the passwords that have been encrypted by this command, the no service password-encryption command needs to be entered.

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The hierarchical network model provides three benefits. Firstly, it reduces contention for bandwidth by dividing the network into different layers, allowing for more efficient data flow. Secondly, it increases fault tolerance by providing redundancy at different layers, ensuring that if one layer fails, the network can still function. Lastly, it simplifies management and troubleshooting by organizing the network into distinct layers, making it easier to identify and resolve issues.

Based on the provided show running-config output, the "switchport trunk allowed vlan" command is not configured on either SW3 or SW4. Therefore, the default behavior of Cisco switches is to allow all VLANs on trunk links. Since all VLANs are allowed on the trunks, SW3 and SW4 will have VLANs 10, 20, and 100 available.

The correct answer is the Fa0/1 interface of switch A. In spanning tree protocol (STP), the non-designated port is the port that is not part of the designated switch or designated bridge for a particular network segment. Since all switches are configured with the default bridge priority, the switch with the lowest MAC address will become the root bridge. In this case, switch A has the lowest MAC address. The non-designated port on the root bridge will be the one with the highest cost to reach the root bridge. Since all links are operating at the same bandwidth, the non-designated port on switch A will be the one with the highest port ID, which is the Fa0/1 interface.

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To meet the given conditions, the network administrator needs to perform two steps. Firstly, they should configure the existing VTP domain name on the new switch. This will ensure that the switch can receive VLAN updates from the VTP domain. Secondly, they need to configure the new switch as a VTP client. This will prevent the technicians in the remote office from adding new VLANs to the switch, as only VTP servers have the ability to create and modify VLANs.

When the crypto key zeroize rsa command is entered on a switch configured with the transport input ssh command on the vty lines, the switch erases the existing RSA key pair. As a result, the switch is no longer able to make SSH connections as an SSH client. However, the switch allows remote connections only after a new RSA key pair is generated. This means that the switch will still accept remote connections, but only after generating a new RSA key pair.

The default configuration of a new switch includes all switch ports being assigned to VLAN1, the flash directory containing the IOS image, and all interfaces being set to auto-negotiation of speed and duplex.

The given answer options correctly describe the router configuration shown in the exhibit. The configuration is appropriate for a router-on-a-stick network design because it shows the use of subinterfaces on the router's FastEthernet interface to connect to multiple VLANs. This allows the router to perform inter-VLAN routing. Additionally, trunking has been appropriately configured on the router subinterfaces, which enables the transmission of VLAN traffic between the router and the connected switches.

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When a switch using port-based memory buffering receives two incoming frames on the same port, and the destination port for the first frame is busy, the switch will handle the second frame by making it wait to be delivered, even if its destination port is available. This is because port-based memory buffering allows only one frame to be transmitted at a time on a specific port, ensuring that frames are delivered in the order they were received. Therefore, the second frame will have to wait until the first frame is delivered before it can be transmitted.

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Switches in VTP client mode can only receive and install VTP updates from switches in VTP server mode. In the given exhibit, only the fourth switch is in server mode, while the other three switches are in client mode. Therefore, only the fourth switch will successfully receive and install VTP updates from Switch1.

The first statement is true because it is mentioned in the exhibit that SW1 connects via two Fast-Ethernet links to reach the root switch. The second statement is true because the cost value represents the numeric value for the fastest path from SW1 to the root switch.