Routing Fundamentals (obj 2.1)

Question 1

What is the primary role of a router?

Answer 1

Connecting subnets within a network or connecting internal and external networks

Routers route traffic between different subnets or networks and separate broadcast domains.

Question 2

How do routers differ from switches in terms of broadcast domains?

Answer 2

Routers separate broadcast domains, while switches maintain one broadcast domain

This distinction is crucial for network segmentation.

Question 3

What functionality can Layer 3 switches perform?

Answer 3

They can function as routers, handling both Layer 2 forwarding and Layer 3 routing

In exams, multi-layer switches are treated as routers.

Question 4

What is the distinction between a standard switch and a multi-layer switch in an exam context?

Answer 4

Switch – standard Layer 2 switch; Multi-layer switch (router) – Layer 3 device

This classification is important for understanding network devices.

Question 5

What is the basic functionality of routers regarding traffic?

Answer 5

Routers forward traffic between networks based on IP addresses

This is essential for inter-network communication.

Question 6

What types of WAN connections do routers use to connect two networks?

Answer 6

• Fiber
• Serial
• Satellite
• VPN links

These connections enable routers to facilitate communication between disparate networks.

Question 7

What happens to a packet when it needs to travel between networks?

Answer 7

It is forwarded to the router (default gateway)

The router plays a critical role in directing the packet to its destination.

Question 8

What type of addresses do routers use to route packets between networks?

Answer 8

IP addresses (Layer 3)

MAC addresses are used internally for communication.

Question 9

What do routers do to data frames for WAN transmission?

Answer 9

They repackage data frames (Layer 2) as packets (Layer 3)

This process is essential for proper data transmission over WAN.

Question 10

What do routers do when delivering packets to the destination device on the local network?

Answer 10

They strip off the IP header and convert packets back to data frames

This conversion is necessary for local network delivery.

Question 11

How do routers and switches collaborate in communication between devices on different networks?

Answer 11

Routers forward packets based on IP addresses; switches deliver data frames based on MAC addresses

This collaboration is vital for effective data transfer.

Question 12

True or False: The internet is considered the world’s largest WAN.

Answer 12

True

This fact underscores the complexity of routing over the internet.

Question 13

Fill in the blank: Routers use _______ to route packets between networks.

Answer 13

IP addresses

This is a key aspect of network communication.