Networks 2 Test 1

Front 1

What is flow control?

Back 1

Receiver returns flow "I can handle x bits" Benefits host from running out of buffers.

Front 2

Receiver returns flow "I can handle x bits" Benefits host from running out of buffers. This is an example of what?

Back 2

Flow Control.

Front 3

What is congestion control?

Back 3

Measured by ACK average time. Benefits everyone by reducing traffic.

Front 4

Measured by ACK average time. Benefits everyone by reducing traffic. This is an example of?

Back 4

Congestion control.

Front 5

What characterizes TCP?

Back 5

Complex, but reliability and ease.

Front 6

Complex, but reliability and ease. This describes what transport system?

Back 6

TCP

Front 7

What are 2 examples of Routing Protocols?

Back 7

RIP and OSPF

Front 8

RIP and OSPF are what type of protocols?

Back 8

Routing protocols.

Front 9

What address information does a router store in a forwarding table?

Back 9

Networks, not hosts.

Front 10

How is an IP routing protocol aggregating?

Back 10

It is collecting hosts into a single network forwarding address.

Front 11

What router deals with the host part of the address?

Back 11

The last router.

Front 12

What part of the address is the responsibility of the last router?

Back 12

To deal with the host part of the address?

Front 13

What is static routing?

Back 13

Hard coded routing.

Front 14

Hard coded routing is called?

Back 14

Static routing.

Front 15

What is routing?

Back 15

Finding the lowest cost path and distributing that info.

Front 16

Finding the lowest cost path and distributing that info is called?

Back 16

Routing

Front 17

When finding the lowest cost path, what can determine the cost?

Back 17

Delay, Data Rate, Error rate or a combination.

Front 18

What information does the distance vector transmit and to whom?

Back 18

It transmits everything it knows to it's immediate neighbor.

Front 19

It transmits everything it knows to it's immediate neighbor.

Back 19

Distance vector.

Front 20

It tells the neighbors about the world.

Back 20

Distance vector.

Front 21

It tells the world about its neighbors.

Back 21

Link-state.

Front 22

What information does the link-state transmit and to whom?

Back 22

It transmits the only info about its immediate neighbor to all routers on the intranet.

Front 23

It transmits the only info about its immediate neighbor to all routers on the intranet.

Back 23

Link-state.

Front 24

Where is a subnet visible?

Back 24

Only on the local network.

Front 25

When a subnet mask is /21 what is that indicating?

Back 25

There are 21 bits in the network address.

Front 26

In IPv4, If a subnet mask is /21, how many bits are in the host address?

Back 26

32 bit address

-21

= 11.

Front 27

What is the default mask of a Class B address?

Back 27

255.255.0.0

Front 28

255.255.0.0 is a default subnet mask. What is the Class of this address?

Back 28

B

Front 29

What is the host size of a class B address?

Back 29

16 bits.

Front 30

What is the default submask of a class A address?

Back 30

255.0.0.0

Front 31

255.0.0.0 is a default subnet mask. What is the Class of this address?

Back 31

Class A

Front 32

What is the host size of a class A address?

Back 32

24 bits

Front 33

What is the host size of a class C address?

Back 33

8 bits

Front 34

255.255.255.0 is a default subnet mask. What is the Class of this address?

Back 34

C

Front 35

What is the default mask of a Class C address?

Back 35

255.255.255.0

Front 36

If different lengths of subnet masks are used, what is this called?

Back 36

Variable Length Subnet Masking (VLSM)

Front 37

Variable Length Subnet Masking (VLSM) means what?

Back 37

Different lengths of subnet masks are used.

Front 38

Can some of the computers on one subnet must use a different subnet mask?

Back 38

No.

Front 39

Can some of the computers on a network but in a different subnet use a different subnet mask?

Back 39

Yes. But the whole subnet must use the same mask.

Front 40

How does an IP packet header get a subnet mask?

Back 40

It is assigned either by administration or a DHCP server.

Front 41

To find its own subnet number a Host does what?

Back 41

ANDs its IP Address with the subnet mask.

Front 42

What do we need a new version of IP protocol?

Back 42

1) 32 bit address is too small all devices.

2) No security.

3) Specialized streaming and multicast are not well supported.

4) DHCP server required for nodes to determine IP address

Front 43

What does the IPv6 traffic class field indicate?

Back 43

Its like TOS in IPv4, special handing and notification to sender of congested path.

Front 44

What does the IPv6 flow label field indicate?

Back 44

Sequence of packets with the same source and destination = flow.

Front 45

What does the IPv6 payloadlen field indicate?

Back 45

Overall packet length

Front 46

What does the IPv6 nextHeader field indicate?

Back 46

It identifies the next header (IPv4 header or Transport header)

Front 47

What does the IPv6 hopLimit label field indicate?

Back 47

TTL (number of hops)

Front 48

What is the size of an IPv6 address?

Back 48

16 bytes

Front 49

In IPv6 why are specific paths assigned?

Back 49

To ensure QOS guarantee.

Front 50

What is the difference between a flow and a connection?

Back 50

A flow is a promise of service. A connection is the relationship two endpoints.

Front 51

What layer manages flow?

Back 51

Managed by TCP at the transport Layer.

Front 52

Where is connection managed?

Back 52

By network, below the IP layer.

Front 53

The Authentication Header of an IPv6 packet does what?

Back 53

Packet source is confirmed.

Packet contents have not been altered.

Front 54

What does an Authentication Header of an IPv6 packet not do?

Back 54

Does NOT conceal packet contents.

Front 55

The Encapsulating Security Payload Header of an IPv6 packet does what?

Back 55

Encryption.