Deck 6: Layer 3/4 Networking/ Transport Protocols

Question 1

Layer 3 protocols often ride ________ layer 2 protocol frames to route to the individual devices in the network.

Answer 1

inside

Question 2

The most common layer 3 routing protocol now in use is:

A) IPX
B) IP
C) DECnet
D) AppleTalk

Answer 2

IP

Question 3

The Layer 4 ________ and the Layer 3 ________ protocol work in unison to transport information across the Internet.

Answer 3

Transport, Network

Question 4

IP may also partner with ________ to package and carry information across the Internet.

Question 5

UDP stands for ________.

Question 6

SPX stands for ________.

Question 7

Voice over IP traffic depends on the ________ protocol.

Question 8

Real time gaming depends on ________ protocol.

Question 9

The term cracking the packet refers to opening up the IP packet and reading the To/From address.

Question 10

The layer 3 protocol must work with a layer 4 protocol in order to deliver traffic end to end.

Question 11

UDP unlike TCP:

A) Has the ability to retransmit lost packets.
B) Monitor the traffic flow end to end.
C) Carries real time voice traffic with less delay.
D) None of the above.

Question 12

The 4 classes of IP addresses are referred to as ________, ________, ________, ________.

Question 13

A Class C IP Address has the following structure where N refers to Network and H refers to Host. NNN.NNN.NNN.HHH

Question 14

The IP protocol has gained its popularity and network dominance due to the ________.

Question 15

The RTP protocol is a layer ________ and ________ protocol.

Question 16

The IP header contains a destination and a host address field.

Question 17

The TCP header contains an ACK/NAK field used to indicate if a packet was lost.

Question 18

The RTP header contains a field used to indicate the packet has priority over other packets similar to overnight air compared to regular mail.

Question 19

The UDP header contains a field that notes an ACK/NACk condition meaning packets were lost.

Question 20

IPX never uses TCP as a layer 4 protocol partner.

Question 21

AppleTalk is a layer 3 protocol used in Apple Networks.

Question 22

TCP/IP protocol is most commonly used to carry best effort ________ traffic.

Question 23

A routing protocol is used to determine which path to send a packet onto.

Question 24

A port number is used by the layer 4 protocol to designate which device is sending the packet.

Question 25

Blocking a port is one way ISPs reduce the amount of SPAM traffic on a network.

Question 26

Port numbers are found in the layer 4 header.

Question 27

A high number of retransmissions on a link carrying TCP/IP traffic indicates:

A) Packets are being lost between devices.
B) Could indicate circuit problems.
C) Could point to a congested link.
D) All of the above.
E) None of the above.

Question 28

A high number of retransmissions on a link carrying UDP/IP

A) Packets are being lost between devices
B) Could indicate circuit problems.
C) Could point to a congested link.
D) All of the above.
E) None of the above.