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700 Series Managed Switch User’s Guide for Software v2.1
Glossary
3
SM-10004-02
Capacity planning
Determining whether current solutions can satisfy future demands. Capacity planning includes evaluating
potential workload and infrastructure changes.
Certificate Authority
A Certificate Authority is a trusted third-party organization or company that issues digital certificates used
to create digital signatures and public-private key pairs.
The role of the CA in this process is to guarantee that the individual granted the unique certificate is, in fact,
who he or she claims to be. Usually, this means that the CA has an arrangement with a financial institution,
such as a credit card company, which provides it with information to confirm an individual's claimed
identity. CAs are a critical component in data security and electronic
commerce because they guarantee that
the two parties exchanging information are really who they claim to be.
Class of Service
A term to describe treating different types of traffic with different levels of service priority. Higher priority
traffic gets faster treatment during times of switch congestion
Collision
A term used to describe two colliding packets in an Ethernet network. Collisions are a part of normal
Ethernet operation, but a sudden prolonged increase in the number of collisions can indicate a problem with
a device, particularly if it is not accompanied by a general increase in traffic.
DHCP
An Ethernet protocol specifying how a centralized DHCP server can assign network configuration
information to multiple DHCP clients. The assigned information includes IP addresses, DNS addresses, and
gateway (router) addresses.
DMZ
Specifying a Default DMZ Server allows you to set up a computer or server that is available to anyone on
the Internet for services that you haven't defined. There are security issues with doing this, so only do this if
you'll willing to risk open access.
DNS
Short for Domain Name System (or Service), an Internet service that translates domain names into IP
addresses.
Because domain names are alphabetic, they're easier to remember. The Internet however, is really based on
IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the
corresponding IP address. For example, the domain name www.example.com might translate to
198.105.232.4. The DNS system is, in fact, its own network. If one DNS server doesn't know how to
translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.