Flashcards in IP Services Q/A's Deck (45)
What is Quality of Service (QOS) used for?
prioritize data traffic
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
In packet switching data packets are sent out in what order?
First in First Out (FIFO)
When packets size limit is depleted what happens to new packets?
What is Class of service in QOS used for?
prioritize data traffic
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
Class Based Weighted Fair Queuing is used to do what in QoS?
divide bandwidth amongst different classes
What is Low Latency Queuing used for?
add a strict priority to data traffic
Class Maps specify what two things?
Class name and class type
The service policy in QoS is also know as what type of Map?
Service policy in QoS can only operate when it is enabled where?
What is Traffic shaping in QoS used for?
delaying traffic of certain threshold "buffer excess packets"
When the rate limit is exceeded in QOS policing what happens?
The two things that syslogs manage are?
system logs and alert messages
The command IP helper address forwards what information, where?
DHCP server information to another router not within it's own network
Dynamic Host Control Protocol DHCP is a centralized server that automates what?
auto configuration of IP addresses for hosts
What are the four DHCP states (DORA) in order?
DCHP Discover (Broadcast)
DHCP Offer (Unicast/Broadcast)
DHCP Request (Broadcast)
DNS Domain Name System is to resolve what?
IP address to host names
What port does DNS use?
DHCP snooping inspects and stop...?
DHCP snooping is enabled needs to be enabled on a?
malicious DHCP packets
What information does SNMP Simple Network Management Protocol collects?
network monitoring and management information
The data variable in SNMP are organized into what type of Information base?
(MIB) Management Information Base
What is Per-hop behavior (PHB)?
packets marked with forwarding precedence
Trivial File Transfer Protocol TFTP is used to do what with remote host?
send or retrieve a single files
TFTP is more or less secure over FTP
What port is TFTP?
What two things is TFTP commonly used for?
Does TFTP require authentication?
There are how many connections established using TFTP for file transfer?