Module 8 Test questions

What is the function of the Destination IPv4 Address in the IPv4 packet header?

32 bit destination address. (pg. 15)

What is the function of Source IPv4 Address in the IPv4 packet header?

32 bit source address. (pg. 15)

Why do I not need NAT?

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large. (pg. 27)

Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?

Destination IPv4 Address. (pg. 19)

What is the function of Header Checksum in the IPv4 packet header?

Detect corruption in the IPv4 header. (pg. 15)

Which term describes a field in the IPv4 packet header that contains an 8-bit binary value used to determine the priority of each packet?

Differentiated services. (pg. 16)

When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation?

Flow label. (pg. 29)

What is the function of Differentiated Services in the IPv4 packet header?

For QoS, DiffServ - DS field or the older IntServ - ToS or Type of Service. (pg. 15)

Which term describes a field in the IPv4 packet header used to detect corruption in the IPv4 header?

Header checksum. (pg. 18)

What is the function of protocol in the IPv4 packet header?

IDs next level protocol: ICMP, TCP, UDP, etc. (pg. 15)

What is the function of Time to Live (TTL) in the IPv4 packet header?

Layer 3 hop count. When it becomes zero, the router will discard the packet. (pg. 15)

What are the characteristics of IP?

Low overhead, Connectionless, best effort, media independent. (pg. 7)

Which term describes a field in the IPv4 packet header used to identify the next level protocol?

Protocol. (pg. 22)

Which routes have next hop addresses?

Remote routes. (pg. 50)

What are two services provided by the OSI network layer? Performing error detection Routing packets toward the destination Encapsulating PDUs from the transport layer Placement of frames on the media Collision detection

Routing packets toward the destination Encapsulating PDUs from the transport layer. (pg. 5)

What are the advantages of IPv6?

Simple. efficient packet handling. (pg. 28)

Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?

Source IPv4 address. (pg. 17)

What does pinging the loopback interface test?

The TCP/IP protocol stack on the host. (pg. 33)

A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem? The cable is not connected properly to the NIC. The computer has an invalid IP address. The computer has an incorrect subnet mask. The computer has an invalid default gateway address.

The computer has an invalid default gateway address. (pg. 42)

Within a production network, what is the purpose of configuring a switch with a default gateway address? Hosts that are connected tot he switch can use the switch default gateway address to forward packets to a remote destination. A switch must have a default gateway to be accessible by Telnet and SSH. The default gateway address is used to forward packets originating from the switch to remote networks. It provides a next-hop address for all traffic that flows through the switch.

The default gateway address is used to forward packets originating from the switch to remote networks. (pg. 41)

Which parameter does the router use to choose the path to the destination when there are multiple routes available? The lower metric value that is associated with the destination network The lower gateway IP address to get to the destination network The higher metric value that is associated with the destination network The higher gateway IP address to get to the destination network

The lower metric value that is associated with the destination network. (pg. 49)

How do hosts ensure that their packets are directed to the correct network destination?

They have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route. (pg. 38)

What is the function of Version in the IPv4 packet header?

This will be for v4, as opposed to v6, a 4 bit field = 0100. (pg. 15)

Which term describes a field in the IPv4 packet header used to limit the lifetime of a packet?

Time to Live (TTL). (pg. 20)

Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?

Version. (pg. 23)

Is IP connectionless?

Yes, IP is connectionless. (pg. 8)