What is PEP in networking?
Performance-enhancing proxies (PEPs) are network agents designed to improve the end-to-end performance of some communication protocols. PEP standards are defined in RFC 3135 (PEPs intended to mitigate link-related degradations) and RFC 3449 (TCP performance implications of network path asymmetry).
What is PEP server?
PEP is a system for HTTP clients, server, and proxies to reliably reason about custom extensions to HTTP. Traditionally, mutually informed HTTP agents could offer extended behavior by adding new message headers. PEP has features for standardizing scope, strength, and ordering of such extensions.
What is TCP splitting?
TCP splitting uses a performance enhancing proxy access node that divides the end-to-end TCP connection between the client and the server into a multi-overlay-hop path where each overlay hop is an independent TCP connection, such that the RTT of each overlay hop is lower than the direct RTT between A and B.
What is policy enforcement point capability?
“Policy Enforcement Point”, is the logical entity or place on a server that enforces policies for admission control and policy decisions in response to a request from a user wanting to access a resource on a computer or network server. PEP is a component of policy-based management.
What is PEP in security?
When a user tries to access a file or other resource on a computer network or server, the PEP will describe the user’s attributes to the Policy Decision Point (PDP), request a security decision, and enforce that decision.
What is fast recovery in TCP?
In TCP/IP, fast retransmit and recovery (FRR) is a congestion control algorithm that makes it possible to quickly recover lost data packets. Without FRR, the TCP uses a timer that requires a retransmission timeout if a packet is lost. No new or duplicate packets can be sent during the timeout period.
What is the effect of the failure of proxy nodes in Split TCP?
One link failure can cause an entire TCP session to choke, when in fact packets can be transferred on other links that are still up. Split TCP helps take advantage of these links that are up. When a link on a local segment fails, it is possible for TCP with proxies to sustain data transfer on other local segments.
What 4 categories are there for Web security policies choose four?
When creating a Security Policy, there are four rule categories that a user can configure: SSL Inspection, URL Filtering, Content Filtering, and Content Inspection.
What does Xacml stand for?
XACML stands for “eXtensible Access Control Markup Language”.
Why is Fast Retransmit used?
The Fast Retransmit mechanism is able to efficiently recover from packet losses as long as no more than one packet is lost in the window. If more than one packet is lost, then usually the retransmit timer for the second or later expires, which triggers the more drastic step of resetting W back to one packet.
How is congestion controlled?
Congestion Control is a mechanism that controls the entry of data packets into the network, enabling a better use of a shared network infrastructure and avoiding congestive collapse. Congestive-Avoidance Algorithms (CAA) are implemented at the TCP layer as the mechanism to avoid congestive collapse in a network.