Trivia Quiz On CISCO Networking And Routers!

Replacing hubs with switches is the most cost-effective way to reduce collisions on the corporate network. Hubs operate at the physical layer of the OSI model and share the bandwidth among connected devices, leading to collisions. Switches, on the other hand, operate at the data link layer and create separate collision domains for each port. This means that devices connected to switches can communicate simultaneously without collisions, improving network performance. Additionally, switches can also provide other benefits like better security, scalability, and management capabilities compared to hubs.

A constant green SYSTEM LED indicates that the switch has passed the Power-On Self Test (POST) and is working properly. POST is a diagnostic test that checks the hardware and software components of the switch during startup. If the switch fails the POST, it would not be able to function properly. Therefore, a constant green SYSTEM LED indicates that the switch has successfully completed the startup process and is ready to operate.

To allow hosts on the same VLAN to communicate across the two switches, the administrator should configure the ports on switches ACC-1 and ACC-2 as trunks. Trunk ports are used to carry traffic for multiple VLANs, allowing VLAN information to be transmitted between switches. By configuring the ports as trunks, the switches will be able to pass VLAN traffic between them, enabling communication between hosts on the same VLAN across the switches.

The command "no VLAN 1" generated an error because VLAN 1 is the default management VLAN and cannot be deleted.

To configure REMO_1 to force it to be elected as DR, the network administrator should set the OSPF priority of REMO_1 to the highest value possible, which is 255. This can be done by entering the command "REMO_1(config)# interface fastethernet 0/0 REMO_1(config-if)# ip ospf priority 255" in the router's configuration. By setting the priority to 255, REMO_1 will have a higher priority than REMO_2 and will be elected as the DR.

The Cisco switches used in the company network operate at the physical layer of the three-layer design model. The physical layer is responsible for the actual transmission of data over the network, including the physical connections and hardware such as cables and ports. In this case, the switches are used to connect the employees' laptop computers to the office LAN using Ethernet ports, which falls under the physical layer's functionality.

The highlighted value 192 in the routing table represents the administrative distance. Administrative distance is a measure used by routers to determine the trustworthiness of a routing protocol. It is a numerical value assigned to each routing protocol, where a lower value indicates a higher priority. In this case, the administrative distance of 192 suggests that the routing protocol associated with this entry is considered less trustworthy or has a lower priority compared to other routing protocols in the network.

The given configuration commands will direct outbound traffic from RT-2 to the ISP and inbound traffic from the ISP to network 192.0.2.0/27. The command "RT-2(config)# ip route 0.0.0.0 0.0.0.0 serial 0/1" on RT-2 sets a default route, which means that any traffic with a destination IP address that is not in the routing table will be forwarded to the ISP. The command "ISP(config)# ip route 192.0.2.0 255.255.255.224 serial 0/0" on the ISP sets a specific route for network 192.0.2.0/27, which means that any traffic with a destination IP address in that network will be forwarded to RT-2.

EIGRP routers establish and maintain neighbor relationships by exchanging hello packets with neighboring routers. These hello packets contain information about the router's EIGRP configuration and are used to discover and establish neighbor relationships. Once the hello packets are exchanged, the routers can exchange routing information and update their neighbor tables accordingly. This process allows EIGRP routers to establish and maintain efficient communication and routing within the network.

OSPF authentication provides two advantages. Firstly, it ensures that routing information comes from a valid source router, which helps in preventing unauthorized or false routing information from being accepted. Secondly, it encrypts routing tables, thereby preventing unauthorized viewing and ensuring the confidentiality of the routing information.

The correct command to remove the static address from the MAC address table is "ALSwitch(config)# no mac-address-table static 00e0.2917.1884 interface fastethernet 0/4 VLAN 1". This command specifically targets the static entry with the MAC address 00e0.2917.1884 and removes it from the MAC address table for the specified interface, VLAN, and port.

Full-duplex Ethernet allows packets to be received and sent simultaneously by a host, which reduces the number of collisions. It also allocates 100 percent of the bandwidth in both directions, ensuring maximum efficiency. However, it does not increase the number of broadcast domains. Full-duplex Ethernet requires a minimum of two wires to support simultaneous communication.