Chapter 20

Question 1

That kind of lag on a network is called. p 784

Answer 1

latency

Question 2

allows us to send voice, video, and data all over the same connection to another location. p 784

Answer 2

Voice over Internet Protocol (VoIP)

Question 3

what does the Video applications do. p785

Answer 3

lets you watch real-time video on the Internet today is great if you have a decent high-speed connection.

Question 4

What is Uptime. p 785

Answer 4

Uptime is the amount of time the system is up and accessible to your end users, so the more uptime you have the better. And depending on how critical the nature of your business is, you may need to provide four-nine or five-nine uptime on your network—that’s a lot.

Question 5

QoS methods focus on one of five problems that can affect data as it traverses network cable.

Answer 5

Delay
Dropped packets 
Error
Jitter 
Out-of-order delivery

Question 6

It works by delaying packets that meet a certain criteria to guarantee usable bandwidth for other applications. p788

Answer 6

Traffic shaping

Question 7

Traffic shaping uses___________ to ensure that certain data streams don’t send too much data in a specified period of time, as well as___________ to control the rate at which traffic is sent. p 788

Answer 7

bandwidth throttling

rate limiting

Question 8

determines which packets are allowed on the network and when. p788

Answer 8

traffic contract

Question 9

What is Load Balancing. p789

Answer 9

Load balancing refers to a technique used to spread work out to multiple computers, network links, or other devices. Using load balancing, you can provide an active/passive server cluster in which only one server is active and handling requests.

Question 10

Is a system-design protocol that guarantees a certain amount of operational uptime during a given period of time.

Answer 10

High availability

Question 11

is a collection of data that duplicates key pieces of original data. p789

Answer 11

cache

Question 12

is basically a database on a server that stores information people need to access fast. p790

Answer 12

caching engine

Question 13

What is Fault Tolerance.p 790

Answer 13

Fault tolerance means that even if one component fails, you won’t lose access to the resource it provides.