Fourth Summative test in CSS 9

Which topology has a single backbone cable?

• Ring

• Star

• Bus

• Mesh

Answer explanation

The bus topology consists of a single backbone cable that connects all devices in the network. Unlike ring, star, or mesh topologies, which have different structures, the bus topology relies on this single cable for data transmission.

In a star topology, all devices are connected to a:

• Hub or switch

• Router

• Firewall

• Repeater

Answer explanation

In a star topology, all devices connect to a central point, which is typically a hub or switch. This allows for easy management and troubleshooting of the network, making 'hub or switch' the correct answer.

Which network topology is the most fault-tolerant?

• Star

• Mesh

• Bus

• Ring

Answer explanation

The mesh topology is the most fault-tolerant because it connects every device to every other device. If one connection fails, data can still be routed through other paths, ensuring continuous network operation.

Which topology requires data to pass through each node to reach its destination?

• Star

• Bus

• Ring

• Mesh

Answer explanation

In a Ring topology, data travels in a circular path and must pass through each node to reach its destination. This is different from other topologies like Star or Bus, where data can take more direct routes.

What happens if the central device in a star topology fails?

• The entire network goes down

• Data reroutes automatically

• The network still functions

• Only some devices are affected

Answer explanation

In a star topology, the central device (hub or switch) is crucial for communication. If it fails, all devices lose connectivity, causing the entire network to go down.

What is the main function of a router?

• Provides internet access

• Encrypts network traffic

• Connects devices in a LAN

• Directs data between different networks

Answer explanation

The main function of a router is to direct data between different networks. It manages traffic by forwarding data packets to their appropriate destinations, ensuring efficient communication across diverse networks.

What protocol do routers use to find the best path for data?

• Routing Protocols (e.g., OSPF, RIP)

• TCP

• UDP

• ICMP

Answer explanation

Routers use Routing Protocols like OSPF and RIP to determine the most efficient path for data transmission. These protocols help in exchanging routing information and making decisions based on network topology.

Which of the following is a valid router command?

• tracert

• show ip route

• ipconfig

• tasklist

Answer explanation

The command 'show ip route' is used in routers to display the routing table, making it a valid router command. The other options, like 'tracert' and 'ipconfig', are not router-specific commands.

What is a default gateway?

• A firewall setting

• A device that assigns IP addresses

• A backup router

• The router that connects a local network to external networks

Answer explanation

A default gateway is the router that connects a local network to external networks, allowing devices within the network to communicate with devices outside of it. This is essential for accessing the internet.

Which of the following assigns IP addresses dynamically?

• NAT

• ARP

• DNS

• DHCP

Answer explanation

DHCP (Dynamic Host Configuration Protocol) is responsible for dynamically assigning IP addresses to devices on a network, allowing them to communicate without manual configuration. The other options do not perform this function.