Specifications

Trend Micro™ OfficeScan™ 10 Administrator’s Guide
A-2
Denial of Service Attack
A Denial of Service (DoS) attack refers to an attack on a computer or network that
causes a loss of "service", namely a network connection. Typically, DoS attacks
negatively affect network bandwidth or overload system resources such as the
computer’s memory.
DHCP
Dynamic Host control Protocol (DHCP) is a protocol for assigning dynamic IP
addresses to devices in a network. With dynamic addressing, a device can have a
different IP address everytime it connects to the network. In some systems, the device’s
IP address can even change while it is still connected. DHCP also supports a mix of
static and dynamic IP addresses.
DNS
Domain Name system (DNS) is a general-purpose data query service chiefly used in the
Internet for translating host names into IP addresses.
When a DNS client requests host name and address data from a DNS server, the
process is called resolution. Basic DNS configuration results in a server that performs
default resolution. For example, a remote server queries another server for data in a
machine in the current zone. Client software in the remote server queries the resolver,
which answers the request from its database files.
Domain Name
The full name of a system, consisting of its local host name and its domain name, for
example, tellsitall.com. A domain name should be sufficient to determine a unique
Internet address for any host on the Internet. This process, called "name resolution",
uses the Domain Name System (DNS).
Dynamic IP Address
A Dynamic IP address is an IP address assigned by a DHCP server. The MAC address
of a computer will remain the same, however, the DHCP server may assign a new IP
address to the computer depending on availability.