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55 Cards in this Set
- Front
- Back
What is flow control? |
Receiver returns flow "I can handle x bits" Benefits host from running out of buffers. |
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Receiver returns flow "I can handle x bits" Benefits host from running out of buffers. This is an example of what? |
Flow Control. |
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What is congestion control? |
Measured by ACK average time. Benefits everyone by reducing traffic. |
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Measured by ACK average time. Benefits everyone by reducing traffic. This is an example of? |
Congestion control. |
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What characterizes TCP? |
Complex, but reliability and ease. |
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Complex, but reliability and ease. This describes what transport system? |
TCP |
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What are 2 examples of Routing Protocols? |
RIP and OSPF |
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RIP and OSPF are what type of protocols? |
Routing protocols. |
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What address information does a router store in a forwarding table? |
Networks, not hosts. |
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How is an IP routing protocol aggregating? |
It is collecting hosts into a single network forwarding address. |
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What router deals with the host part of the address? |
The last router. |
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What part of the address is the responsibility of the last router? |
To deal with the host part of the address? |
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What is static routing? |
Hard coded routing. |
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Hard coded routing is called? |
Static routing. |
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What is routing? |
Finding the lowest cost path and distributing that info. |
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Finding the lowest cost path and distributing that info is called? |
Routing |
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When finding the lowest cost path, what can determine the cost? |
Delay, Data Rate, Error rate or a combination. |
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What information does the distance vector transmit and to whom? |
It transmits everything it knows to it's immediate neighbor. |
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It transmits everything it knows to it's immediate neighbor. |
Distance vector. |
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It tells the neighbors about the world. |
Distance vector. |
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It tells the world about its neighbors. |
Link-state. |
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What information does the link-state transmit and to whom? |
It transmits the only info about its immediate neighbor to all routers on the intranet. |
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It transmits the only info about its immediate neighbor to all routers on the intranet. |
Link-state. |
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Where is a subnet visible? |
Only on the local network. |
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When a subnet mask is /21 what is that indicating? |
There are 21 bits in the network address. |
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In IPv4, If a subnet mask is /21, how many bits are in the host address? |
32 bit address -21 = 11. |
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What is the default mask of a Class B address? |
255.255.0.0 |
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255.255.0.0 is a default subnet mask. What is the Class of this address? |
B |
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What is the host size of a class B address? |
16 bits. |
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What is the default submask of a class A address? |
255.0.0.0 |
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255.0.0.0 is a default subnet mask. What is the Class of this address? |
Class A |
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What is the host size of a class A address? |
24 bits |
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What is the host size of a class C address? |
8 bits |
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255.255.255.0 is a default subnet mask. What is the Class of this address? |
C |
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What is the default mask of a Class C address? |
255.255.255.0 |
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If different lengths of subnet masks are used, what is this called? |
Variable Length Subnet Masking (VLSM) |
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Variable Length Subnet Masking (VLSM) means what? |
Different lengths of subnet masks are used. |
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Can some of the computers on one subnet must use a different subnet mask? |
No. |
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Can some of the computers on a network but in a different subnet use a different subnet mask? |
Yes. But the whole subnet must use the same mask. |
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How does an IP packet header get a subnet mask? |
It is assigned either by administration or a DHCP server. |
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To find its own subnet number a Host does what? |
ANDs its IP Address with the subnet mask. |
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What do we need a new version of IP protocol? |
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 |
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What does the IPv6 traffic class field indicate? |
Its like TOS in IPv4, special handing and notification to sender of congested path. |
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What does the IPv6 flow label field indicate? |
Sequence of packets with the same source and destination = flow. |
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What does the IPv6 payloadlen field indicate? |
Overall packet length |
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What does the IPv6 nextHeader field indicate? |
It identifies the next header (IPv4 header or Transport header) |
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What does the IPv6 hopLimit label field indicate? |
TTL (number of hops) |
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What is the size of an IPv6 address? |
16 bytes |
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In IPv6 why are specific paths assigned? |
To ensure QOS guarantee. |
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What is the difference between a flow and a connection? |
A flow is a promise of service. A connection is the relationship two endpoints. |
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What layer manages flow? |
Managed by TCP at the transport Layer. |
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Where is connection managed? |
By network, below the IP layer. |
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The Authentication Header of an IPv6 packet does what? |
Packet source is confirmed. Packet contents have not been altered. |
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What does an Authentication Header of an IPv6 packet not do? |
Does NOT conceal packet contents. |
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The Encapsulating Security Payload Header of an IPv6 packet does what? |
Encryption. |