Information Technology Reference
In-Depth Information
PAT
Port Address Translation. Maps multiple unregistered or private IP addresses to a single
registered IP address by using different ports.
path isolation
Provides independent logical traffic paths over shared network.
PBR
Policy-based routing. Commonly used to modify the next-hop IP address based on the
source address.
PBX
Private Branch Exchange. Legacy voice switch.
performance management
Measures the network's effectiveness at delivering packets.
PIM
Protocol Independent Multicast. Routing protocol for multicast destinations.
PoE
Power over Ethernet.
policy control
Policies are applied to all users and devices across the architecture.
power in the data center facility
Used to power cooling devices, servers, storage equip-
ment, network, and some lighting.
PPDIOO
Prepare, Plan, Design, Implement, Operate, and Optimize. Life cycle of the net-
work.
PSTN
Public switched telephone network.
QPPB
QoS Policy Propagation on BGP. Uses iBGP to spread common QoS parameters from
one router to other routers in the network. It classifies packets using IP precedence bits based
on BGP community lists, BGP autonomous system paths, and access lists.
RAP
Rooftop AP. Connects the mesh to the wired network.
rate limiting
Rate limiting controls the rate of bandwidth that incoming traffic is using, such
as ARPs and DHCP requests.
reconnaissance
Reconnaissance gathers as much information as possible about the target
host/network.
RF groups
Cluster of WLC devices that coordinate their RRM calculations.
RIPng
Routing Information Protocol next generation. RIPng is a distance-vector routing pro-
tocol for IPv6 networks.
RIPv2
Routing Information Protocol Version 2. RIPv2 is a distance-vector routing protocol
for IP v4 net work s that s uppor ts VL SMs, route authent ic at ion, and mult ic ast of route update s.
RMON
Remote Monitoring. Standard monitoring specification that enables network moni-
toring devices and console systems to exchange network monitoring data. RMON1 looks at
data link layer data. RMON2 looks at network to application layer data.
router
Routers consolidate IOS firewall, IPS, IPsec VPN, DMVPN, and SSL VPN into the
routing platforms to secure the router if it is attacked.
RRM
Radio Resource Management. Method to manage AP radio frequency channels and
power configuration.
