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Flashcards in IP Services Q/A's Deck (45)
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1

What is Quality of Service (QOS) used for?

prioritize data traffic

2

The standard traditional values for an acceptable video quality call for latency, jitter, loss are?

< 150ms Latency (delay)
< 30ms Jitter (variation in delay)
< 1% Loss

3

In packet switching data packets are sent out in what order?

First in First Out (FIFO)

4

When packets size limit is depleted what happens to new packets?

dropped

5

What is Class of service in QOS used for?

prioritize data traffic

6

What does NBAR stand for?

What is NBAR responsible for in QOS between layers 3 - 7?

Network-Based Application Recognition

deep packet inspection - marks and monitors data traffic

7

Class Based Weighted Fair Queuing is used to do what in QoS?

divide bandwidth amongst different classes

8

What is Low Latency Queuing used for?

add a strict priority to data traffic

9

Class Maps specify what two things?

Class name and class type

10

The service policy in QoS is also know as what type of Map?

Policy Map

11

Service policy in QoS can only operate when it is enabled where?

interface

12

What is Traffic shaping in QoS used for?

delaying traffic of certain threshold "buffer excess packets"

13

When the rate limit is exceeded in QOS policing what happens?

packets drops

14

The two things that syslogs manage are?

system logs and alert messages

15

The command IP helper address forwards what information, where?

DHCP server information to another router not within it's own network

16

Dynamic Host Control Protocol DHCP is a centralized server that automates what?

auto configuration of IP addresses for hosts

17

What are the four DHCP states (DORA) in order?

Acronym (DORA)

DCHP Discover (Broadcast)
DHCP Offer (Unicast/Broadcast)
DHCP Request (Broadcast)
DHCP Acknowledgement

18

DNS Domain Name System is to resolve what?

IP address to host names

19

What port does DNS use?

53

20

DHCP snooping inspects and stop...?

DHCP snooping is enabled needs to be enabled on a?

malicious DHCP packets

Trusted Port

21

What information does SNMP Simple Network Management Protocol collects?

network monitoring and management information

22

The data variable in SNMP are organized into what type of Information base?

(MIB) Management Information Base

23

What is Per-hop behavior (PHB)?

packets marked with forwarding precedence

24

Trivial File Transfer Protocol TFTP is used to do what with remote host?

send or retrieve a single files

25

TFTP is more or less secure over FTP

Less secure

26

What port is TFTP?

port 69

27

What two things is TFTP commonly used for?

hardware maintenance
system updates

28

Does TFTP require authentication?

no

29

There are how many connections established using TFTP for file transfer?

single connection

30

With FTP what two things can you do between remote hosts?

File transfers and uploads