Glossary
GL-11
Cisco Security Appliance Command Line Configuration Guide
OL-12172-03
J
JTAPI
Java Telephony Application Programming Interface. A Java-based API supporting telephony
functions. See also
TAPI
.
K
key
A data object used for
encryption
,
decryption
, or
authentication
.
L
LAN
Local area network. A network residing in one location, such as a single building or campus. See also
Internet
,
intranet
, and
network
.
layer, layers
Networking models implement layers with which different protocols are associated. The most
common networking model is the OSI model, which consists of the following 7 layers, in order:
physical, data link, network, transport, session, presentation, and application.
LCN
Logical channel number.
LDAP
Lightweight Directory Access Protocol. LDAP provides management and browser applications with
access to X.500 directories.
M
mask
A 32-bit mask that shows how an
Internet
address is divided into network, subnet, and host parts. The
mask has ones in the bit positions to be used for the network and subnet parts, and zeros for the host
part. The mask should contain at least the standard network portion, and the subnet field should be
contiguous with the network portion.
MCR
See
multicast
.
MC router
Multicast (MC) routers route multicast data transmissions to the hosts on each LAN in an internetwork
that are registered to receive specific multimedia or other broadcasts. See also
multicast
.
MD5
Message Digest 5. A one-way hashing algorithm that produces a 128-bit hash. Both MD5 and
SHA-1
are variations on MD4 and are designed to strengthen the security of the MD4 hashing algorithm.
SHA-1
is more secure than MD4 and MD5. Cisco uses hashes for authentication within the
IPSec
framework. Also used for message authentication in SNMP v.2. MD5 verifies the integrity of the
communication, authenticates the origin, and checks for timeliness.
MD5
has a smaller digest and is
considered to be slightly faster than
SHA-1
.
MDI
Media dependent interface.
MDIX
Media dependent interface crossover.
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Страница 45: ...P A R T 1 Getting Started and General Information ...
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Страница 277: ...P A R T 2 Configuring the Firewall ...
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Страница 354: ...17 38 Cisco Security Appliance Command Line Configuration Guide OL 12172 03 Chapter 17 Configuring NAT NAT Examples ...
Страница 561: ...P A R T 3 Configuring VPN ...
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Страница 891: ...P A R T 4 System Administration ...
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Страница 975: ...P A R T 5 Reference ...
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