Introduction to routing

Which one of the following statements is true ?

• Switches use IP addresses in frames to send frames to the destination device

• Routers use MAC addresses to route packets

• Routers decapsulate frames and only look at the IP packets

• MAC addresses identify a device's connection to a network

The Internet Protocol (IP) is

• a connectionless protocol

• a connection oriented protocol

• dependent on link technology

• a reliable protocol

What piece of information is NOT necessary to be internet-connected ?

• An IP address

• A netmask

• A default gateway

• Chrome browser

IPv4 addresses are made up of

• 16 bits

• 32 bits

• 64 bits

• 128 bits

What is the slash notation for netmask 255.255.255.192 ?

• /24

• /25

• /26

• /27

How many usable IP addresses are there in a network that has a /25 netmask ?

• 254

• 126

• 62

• 30

What is the purpose of the routing table ?

• gives the MAC address of the next hop

• gives the IP address of the next hop

• gives the IP address of the destination device

• gives the MAC address of the destination device

Which one of the following statements is NOT correct ?

• Router only pass on unicast packets

• Routers only change the TTL in a packet

• IP addresses in a packet NEVER change

• MAC addresses in a packet never change

What subnet mask can be used to to host 25 computers ?

• /30

• /29

• /28

• /27

What subnet mask can be used to host 900 computers ?

• 255.255.252.0

• 255.255.254.0

• 255.255.255.0

• 255.255.255.128