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Barracuda Load Balancer ADC

Glossary

PaaS
  • Also known as: platform as a service

Cloud platform services, where the computing platform (operating system and associated services) is delivered as a service over the Internet by the provider.

packet
  • Also known as: pkt

A unit of data routed between an origin and a destination over a network.

packet fragmentation

Part of the processing of TCP IP traffic that consists of fragmenting, sending, and reassembling packets.

padding

Additional, meaningless data adds to a packet to increase its size.

PAYG

PCI DSS
  • Also known as: Payment Card Industry Data Security Standard, PCI-DSS

Standards for security practices when using payment cards (e.g., credit, debit, gift).https://www.pcisecuritystandards.org/security_standards/

peer

A device to which a computer has a network connection that is relatively symmetrical and where both devices can initiate or respond to a similar set of requests.

persistent storage

A data storage solution where the data remains intact until it is deleted.

Personal Firewall

Component of the Barracuda Network Access Client. Centrally managed host firewall that can handle up to four different rulesets at once, depending on the policy applicable to user, machine, date, and time

PKCS #n
  • Also known as: Public Key Cryptography Standards

Refers to a group of standards, in the format PKCS #n, where n =1 to 15. For example: Certificates can be downloaded in PKCS #12 format, which includes the private key and certificate.

Placement Group

Logical grouping of AWS instances within a single Availability Zone.

policy routing

Also called source-based routing, is used when the source IP address of the connection determines, in part or completely, which route is used.

policy simulator

A tool in the IAM AWS Management Console that helps you test and troubleshoot policies so you can see their effects in real-world scenarios.

polling

A means of Media Access Control where a device may only transmit information when it is given permission to transmit by a controller device.

PPTP
  • Also known as: Point-to-Point Tunneling Protocol

A network protocol that is used to establish VPN tunnels.

Premium Support

24/7 support, offered by Barracuda Networks

private subnet

A VPC subnet whose instances cannot be reached from the Internet.

promiscuous mode

In this mode, a network device can receive and process all of the packets on its network. Can be used in packet sniffing. 

provisioning

Process of preparing and equipping a network or device to allow it to provide services to its users.

public cloud

Cloud computing model, in which a service provider makes resources, such as applications and storage, available to the general public over the Internet. Examples include Amazon AWS, Google Cloud Platform, and  Microsoft Azure.

public cloud hosting

Cloud-hosted virtual machines, such as Microsoft Azure and Amazon Web Services.

public IP address

External IP address, assigned to a computing device to allow direct access over the Internet. For example, a web server, email server or any server device directly accessible from the Internet.

public key

A value provided by a designated authority as an encryption key.  Public key cryptography (asymmetric cryptography) uses pairs of keys: public keys that may be distributed widely, and private keys that are known only to the owner.

public subnet

A subnet whose instances can be reached from the Internet.

RADIUS
  • Also known as: Remote Authentication Dial-In User Service, WiFi Access Point Authentication

Networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service.

RDP
  • Also known as: Remote Desktop Protocol

A proprietary protocol developed by Microsoft that provides a user with a graphical interface to connect to another computer over a network connection.

RDS

AWS term, managed Relational Database Service

real time
  • Also known as: realtime, real-time

The time in which an action is performed.

regular expression

A combination of characters or character classes and operators that describe text for matching purposes.

replication

Involves sharing information to ensure consistency between sources. By comparison, backups save data unchanged for a long period of time; replicas undergo frequent updates.

Reserved Instance

A pricing option for EC2 instances that discounts the on-demand usage charge for instances that meet the specified parameters. Customers pay for the entire term of the instance, regardless of how they use it.

Reserved IP addresses
  • Also known as: RIP

IP addresses reserved for special purposes. For example, IP addresses reserved and assigned to Azure cloud services.

REST API
  • Also known as: Representational State Transfer API

A software architecture style for building scalable web services. REST gives a coordinated set of constraints to the design of components in a distributed hypermedia system that can lead to a higher performing and more maintainable architecture.An API (Application Programming Interface) is the means by which third parties can write code that interfaces with other code.

reverse lookup zone

Support the secondary function of Domain Name System (DNS) - the resolution of IP addresses to host names.

reverse proxy

The HTTP Proxy directs incoming requests from other servers to clients without providing the origin details.

RMA
  • Also known as: Routing Information Protocol

Numbered authorization provided by a merchant, like Barracuda Networks, to permit the return of a product.

rollback

A return to a previous state after an installation or configuration failure.

root certificate

A CA-signed or self-signed public key certificate that identifies the root certificate authority (CA).

Round-Robin policy

Method of traffic balancing among links/interfaces in circular order.

Route 53

AWS service for DNS-based load balancing that connects user requests to EC2 instances, ELBs, S3 buckets, and Internet applications and provides health checks for monitoring or to route traffic to healthy endpoints.

route table

In AWS, a set of routing rules that controls the traffic leaving any subnet that is associated with the route table. You can associate multiple subnets with a single route table, but a subnet can be associated with only one route table at a time.

routed bridging

Bridging mode where the router acts as a bridge.

RPC protocols
  • Also known as: Rate Control Protocol, ONC-RPC, DCE-RPC

Congestion control algorithm designed for fast download times such as user response times, or flow-completion times. 

RRS

One of the four storage classes in AWS. 99.9& SLA reduced redundancy storage, lower fault tolerance, stored in 1 region.

ruleset

A collection of one or more access or application rules.