MODULE 8_NETWORKING

Which command can be used on a Windows host to display the routing table?

• netstat -s

• show ip route

• netstat -r

• tracert

What information is added during encapsulation at OSI Layer 3?

• source and destination MAC

• source and destination application protocol

• source and destination port number

• source and destination IP address

How does the network layer use the MTU value?

• The network layer depends on the higher level layers to determine the MTU.

• The 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.

Which characteristic describes an IPv6 enhancement over IPv4?​

• IPv6 addresses are based on 128-bit flat addressing as opposed to IPv4 which is based on 32-bit hierarchical addressing.

• The IPv6 header is simpler than the IPv4 header is, which improves packet handling.

• Both IPv4 and IPv6 support authentication, but only IPv6 supports privacy capabilities.

• The IPv6 address space is four times bigger than the IPv4 address space.

When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?

• Connectionless acknowledgements are used to request retransmission.

• Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.

• Network layer IP protocols manage the communication sessions if connection-oriented transport services are not available.

• The best-effort delivery process guarantees that all packets that are sent are received.

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

• to make reading a 32-bit address easier

• to relieve IPv4 address depletion

• to provide more address space in the Internet Names Registry

• to allow NAT support for private addressing

Which statement accurately describes a characteristic of IPv4?

• All IPv4 addresses are assignable to hosts.

• IPv4 has a 32-bit address space.

• An IPv4 header has fewer fields than an IPv6 header has.

• IPv4 natively supports IPsec

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

• Flag

• Time-to-Live

• Packet Length

• Destination Address

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

• destination MAC address

• destination IP address

• source IP address

• source MAC address

Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?

• TTL

• Hop Limit

• Address Unreachable

• No Route to Destination