Networking Test 3

What IP address serves as a catch all address?

0.0.0.0

Traditionally, what address is used as the loopback IP address?

127.0.0.1

What is the maximum size that can be represented in a field that is 4-bit long?

15

How many bytes is an IPv6 address?

16

When a router interface is configured with an IP address and subnet mask and is activated, how many routing entries are added to the routing table?

2

What is the size, in bytes, of a basic IPv4 header? Meaning, not including any options.

20

Say an IPv4 packet arrives at a receives and its Internet Header Length field is set to 7, how large is the header (in bytes)?

28

How many bits is an IPv4 address?

32 bits

How many bytes is an IPv4 address?

4 bytes

How large is the (theoretical) IPv4 address space is? Meaning, how many different IP addresses can we have

4,294,967,296

A packet arrives with a Total Length field equal to 100 and an Internet Header Length field equal to 5, what is the payload size?

80

Match each IP characteristic with its delivery method: Does not guarantee that the packet will be delivered fully without errors

Best Effort

Match each IP characteristic with its delivery method: Packet delivery is not guaranteed

Best Effort

Match each IP characteristic with its delivery method: Doesn't require additional fields in a PDU header to maintain an established connection

Connectionless

Match each IP characteristic with its delivery method: No contact is made with the destination host before sending a packet

Connectionless

Match each IP characteristic with its delivery method: Will send a packet even if the destination host is not available to receive it

Connectionless

Which switch packet forwarding mechanism is the fastest?

Cut through using fast forwarding

Which switch packet forwarding mechanism provides a balance between forwarding speed and frame integrity?

Cut through using fragment-free switching

Match each IPv4 function with the IPv4 header field to which it belongs: Identifies the IP address of the recipient host

Destination IP address

Match each IPv4 function with the IPv4 header field to which it belongs: Identifies the priority of each packet

Differentiated Services

(T/F): A Layer-2 (L2) LAN switch inspects the IP address of arriving frames

False

(T/F): A hub is an example of a full-duplex communication device.

False

(T/F): A problem that arises with shared memory buffering is head-of-the-line blocking.

False

(T/F): A receiver can tell whether the data in an IP packet is corrupt by computing a CRC value which it compares against one enclosed with the packet itself.

False

(T/F): IP has the capability to recover from undelivered or corrupt packets.

False

(T/F): IP is a best-effort delivery protocol which means it works properly sometimes and does not function well at other times.

False

(T/F): In a MAC address table, a one-to-one mapping relation exists between ports and addresses In other words, each port will be mapped to exactly one MAC address, simply because at the other end of the port lies a a computer of some type, which has only one MAC address.

False

(T/F): The TTL field of an IPv4 packet is a measure of packet lifetime in seconds/milliseconds.

False

(T/F): You need a default gateway to send packets to devices on the local network.

False

Match each IPv4 function with the IPv4 header field to which it belongs: Error-checks the IP header - if incorrect, the packet is discarded

Header Checksum

Match each IPv4 function with the IPv4 header field to which it belongs: Identifies the number of 32-bit words in the header

Internet Header Length

Match each IP characteristic with its delivery method: Fiber optics cabling, satellites, and wireless can all be used to route the same packet

Media Independent

Match each IP characteristic with its delivery method: Will adjust the size of the packet sent depending on what type of network access will be used

Media Independent

Match each IPv4 function with the IPv4 header field to which it belongs: Identifies the upper-layer protocol to be used next

Protocol

Where does a router store routing table information?

RAM

Say a frame arrives to a switch. Upon inspecting the destination MAC address of the arriving frame, the switch realizes that address is not in its MAC Address Table, what does the switch do in this case?

Sends the frame out of all ports except the one through which it arrived.

Which switch packet forwarding mechanism is needed for QoS support?

Store and Forward

Which switch packet forwarding mechanism provides the best integrity?

Store and Forward

Which field does the traceroute command make use of to report back the different routers between you and a certain destination (e.g., yahoo.com)?

TTL

Match each IPv4 function with the IPv4 header field to which it belongs: Commonly referred to as hop count

Time-to-Live

Match each IPv4 function with the IPv4 header field to which it belongs: Maximim value is 65,535 bytes

Total Length

(T/F): In port-based memory buffering, two buffers are associated with each port, one for incoming traffic (input port) and one for outgoing traffic (output port).

True

(T/F): There is a possibility of collision when operating in Half-Duplex mode, while there is no possibility of collision in Full-Duplex.

True

(T/F): Using shared memory buffering, a port is assigned buffer space proportional to its needs, meaning some ports may get more memory allocated than others.

True

Match each IPv4 function with the IPv4 header field to which it belongs: Always set to (0100)2 for IPv4

Version

In which mode is the following IOS command issued? mdix auto

nterface sub-configuration mode

What is the command you'd issue to display a host routing table?

route print netstat -r