Lightning SA MultiCom, Руководство пользователя

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Glossary User’s Manual 151
Invalid - A packet which could not be identified for some reason such as running
out of memory, ICMP errors which do not correspond to known connections.
Crossed Cable
An RJ45 ethernet cable that allows you to connect to network devices together
without needing a hub in between them. For instance you might use this cable if
you chose to connect your router directly to your computer or laptop. MultiCom
crossed cables are blue or have a blue tape around them.
This cable is useful when you need to do direct testing and configurations of a
network device and do not have a hub nearby.
Denial of Service
Also known as DoS, is a type of network attack where the attacker floods a
known firewall or server with packets, thereby degrading network performance
and possibly crashing the software that is receiving those packets.
Destination
The IP address of the firewall or host to which the data packet should be sent.
DHCP
Dynamic Host Configuration Protocol simplifies network administration by
assigning IP addresses and other configurations from a central DHCP server. This
information is given out to DHCP Clients that request it, usually for a preset
period of time before a new request must be made.
See RFC1531
DHCP Client
A computer or device configured to receive its IP address, subnet mask, broadcast
address, firewall address, domain name and DNS servers necessary to operate on
the network. The client also receives a lease time after which it must ask the
DHCP server if it can still have this information or if there is a new configuration
that should be used instead.
DHCP Server
A computer configured with IP addresses to manage as well as other data
necessary for a networked device to operate on the network. It responds to
requests by DHCP clients who ask for this information. Many networks use this
as a convenient way to manage many computers from one place.
DNS