ITN - Module 8 - Network Layer

The Network layer performs four basic operations (Choose two)

• Routing

• Decides if the packet is reliable or unreliable

• Formats to allow frames on the media

• Translates the IP address to the MAC address

• Provides a unique identifier

Which command can be used on a Windows host to display the routing table? (Choose two)

• Route print

• Tracert

• Netstat -r

• Show ip route

• ipconfig /route

When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?

• The interface

• Source IP address

• Destination IP address

• Source MAC address

• Destination MAC address

Which IPv4 address can a host use to ping the loopback interface to check if the TCP/IP stack is working?

• 127.255.255.255

• 224.0.0.1

• 127.0.0.1

• 127.0.0.0

• ::1/128

What was the reason for the creation and implementation of IPv6?

• To relieve IPv4 address depletion

• Allow NAT support for private addressing

• Header supports additional fields for complex packets

• Supports Class-based networks

• Standardizes the use of NAT

Which parameter does the router use to choose the path to the destination when there are multiple routes available?

• The higher AD value

• The lower AD value

• The higher metric value

• The lower gateway IP address

• The lower metric value

Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly?

• Time to live

• Hop limit

• DS

• Version

• Options

How does the network layer use the MTU value?

• Network layer depends on the data link layer to set the MTU and adjusts the speed of transmission to accommodate it

• The MTU is passed to the network layer by the data link layer

• To increase speed of delivery, the network layer ignores the MTU

• Network layer depends on the higher layers to determine the MTU

Which field in an IPv4 packet header will typically stay the same during its transmission?

• Options

• Time to live

• Flag

• Packet length

• Destination IP address

What is a characteristic of static routing? (choose two)

• Good for small non-redundant networks

• Must be configured manually

• Are a major security risk without configuration

• Network changes are updated automatically

• Always chooses the best route