Cisco Explorer 4700 Installation Guide download pdf (Page 620)

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Glossary

GL-4

Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-02

object

A physical entity, service, or resource that can be managed using ACE Appliance Device Manager.

object group

A logical grouping of similar objects, such as servers, clients, services, or networks. Creating an object

group allows you to apply common attributes to a number of objects without specifying each object

individually.

PAT

Port Address Translation. A mechanism that allows many devices on a LAN to share one IP address by

allocating a unique port address at Layer 4.

PEM

Privacy Enhanced Mail. Internet e-mail that provides confidentiality, authentication, and message

integrity using various encryption methods. Not widely deployed in the Internet.

ping

A common method for troubleshooting the accessibility of devices.

A ping tests an ICMP echo message and its reply. Because ping is the simplest test for a device, it is

the first to be used.

Run ping to view the packets transmitted, packets received, percentage of packet loss, and round-trip

time in milliseconds.

PKCS

Public-Key Cryptography Standards. A series of specifications published by RSA Laboratories for data

structures and algorithm usage for basic applications of asymmetric cryptography.

port

1. An interface on an internetworking device (such as a router); a physical entity.

2. In IP terminology, an upper-layer process that receives information from lower layers. Ports are

numbered, and each numbered port is associated with a specific process. For example, SMTP is

associated with port 25. A port number is also called a well-known address.

3. To rewrite software or microcode so that it will run on a different hardware platform or in a different

software environment than that for which it was originally designed.

RAS

Registration, Admission, and Status Protocol. Protocol that is used between endpoints and the

gatekeeper to perform management functions. RAS signalling function performs registration,

admissions, bandwidth changes, status, and disengage procedures between the VoIP gateway and the

gatekeeper.

RBAC

Role-Based Access Control. A mechanism that allows privileges to be assigned to defined roles. The

roles are then assigned to real users, allowing or limiting access to specific features as appropriate for

each role.

real server

A real server is a physical device assigned to a server farm.

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