Network Optimization Flashcards
What are the 4 real-time services in which rely on an optimized network?
1) VoIP
2) Video applications/Video Conferencing
3) Presence
4) Multi-casting
What method of quality of service can support up to 64 different classifications, functions at layer 3, and uses the below 3 classes of traffic:
1) expedited forwarding
2) assured forwarding
3) Class Selector
DSCP (Differentiated Services Code Point or DiffServ)
The Class of Service method of QoS is defined in what IEEE standard and is expressed through which field and in which IEEE header?
Defined in IEEE 802.1p
Expressed through the 3-bit Priority Code Point in the VLAN header IEEE 802.1Q
Class of Service provides how many levels of service?
7
What are the 3 main components of a Unified Communications system?
UC Servers
UC Devices
UC Gateway
What’s the difference between bandwidth throttling and rate limiting?
bandwidth throttling deals with the amount of data and the time-period in which it is send
limiting deals with the rate at which it is sent
Where do traffic shaping devices store delayed traffic before releasing it?
in the FIFO buffer
Which type of back up combination will incur the longest restoration: Full/Differential or Full/Incremental
Full/Incremental. Because there will be several incremental backup tapes as opposed to just using one differential.
What computer network architecture decouples network control and forwarding functions, enabling network control to become directly programmable and the underlying infrastructure to be abstracted from applications and network services.
Software Defined Networking
Cisco’s OpenStack cloud operating system is an example of what type of service?
Network as a Service (NaaS)
Which storage type uses a switched fabric topology protocol and its adapters can exchange information on QoS? Why is QoS important from a SAN perspective?
Infiniband
QoS is important because storage protocols are time-sensitive
What are the 5 common data rates used in Fibre Channel?
2, 4, 8 and 16Gbps
what 3 protocols can be used to connect to a NAS?
NFS, CIFS and HTTP
What are the 4 typical service levels made available through cloud deployment?
IaaS
PaaS
SaaS
NaaS
What are the 3 connectivity methods to connect to a virtual server over a VPN or WAN in a cloud environment?
Remote Desktop (RDP for Win, SSH for Lnx)
FTP
VMware remote console
What is the purpose of the MDF?
To connect internal communications equipment to external subscriber carrier equipment.
What are the two main aims of cable management?
1) protect the integrity of cables
2) prevent overheating of the infrastructure caused by unruly cables blocking airflow
What’s the difference between a power converter and power inverter?
power converter converts AC to DC
Power inverter converts DC to AC
A/B power means what?
Running two separate power circuits into a facility
Considerations for device placement include what 3 things?
Airflow
Cable Trays
Rack systems
port labelling involves labelling what?
switch ports, patch panels to wall outlets
When labelling systems in a rack, what two pieces of information should be included for devices that are connected to a network?
IP addresses and DNS
What standard provides specifications for clear labelling and admin best practices across all electrical and network systems?
TIA/ANSI 606-B.1 (example is dividing the floorspace into quadrants)
What are the 3 key reasons why you need to carefully manage bandwidth?
1) Latency sensitivity
2) high-bandwidth applications
3) Uptime
