Network Availability Flashcards
Availability
Being up and operational
Reliability
not dropping packets
mean time to repair
measures average it takes to repair something
mean time between failures
amount of between once device failing fixing it and failing again
NIC Teaming
Using a group of network interface cards for load balancing and failover on a server or other device
Link Aggregation Control Protocol (LACP)
Achieves redundancy by having multiple links between the network de4vices where load balancing over multiple links can occur
Multipathing
Creates more than one physical path between the server and its storage devices for better fault tolerance and performance
Cold Site
An available building that does not have any hardware or software in place or configured
Warm site
building is available and already has a lot of the equipment; may not maintain it fully every year
Hot Site
An available building with equipment and data; ready for an instant switch
Cloud Site
not exactly full recovery; virtual recovery site that allows you to create it in the cloud; paying cloud service provider
Recovery Time Objective (RTO)
How much time did it take to recovery after the notification of business process disruption?
Recovery Point Objective (RPO)
Interval of time during a disruption before data lost exceeds the BCP’s maximum allowable threshold or tolerance
Incremental Backup
only backup the stuff since doing the last backup
Differential Backup
Entire difference since the last full backup
Snapshot
Read-only copy of your data in a frozen state
PDU
usually takes the form of a large cabinet; not full blackout compatible
Quality of Service
It’s when prioritize different things to make your network operate more efficiently
Delay
The time a packet travels from source to destination
Jitter
Uneven arrival of packets which is especially harmful in VoIP traffic
Drops
Occurs during link congestion when a router’s interface queue overflows and causes packet loss
Shaping
Allows buffer to delay traffic from exceeding the configured rate
