Cisco ASA 5505 Configuration Manual page 1783

K
A data object used for encryption, decryption, or authentication.
key
L
Layer Two Tunneling Protocol. An IETF standards track protocol defined in RFC 2661 that provides
L2TP
tunneling of PPP. L2TP is an extension to the PPP. L2TP merges the older Cisco Layer Two
Forwarding (L2F) protocol with PPTP. L2TP can be used with IPsec encryption and is considered
more secure against attack than PPTP.
Local area network. A network residing in one location, such as a single building or campus. See also
LAN
Internet, intranet, and network.
Networking models implement layers with which different protocols are associated. The most
layer, layers
common networking model is the OSI model, which consists of the following seven layers, in order:
physical, data link, network, transport, session, presentation, and application.
Logical channel number.
LCN
Lightweight Directory Access Protocol. LDAP provides management and browser applications with
LDAP
access to X.500 directories.
M
A 32-bit mask that shows how an
mask
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.
See multicast.
MCR
Multicast (MC) routers route multicast data transmissions to the hosts on each LAN in an internetwork
MC router
that are registered to receive specific multimedia or other broadcasts. See also multicast.
Message Digest 5. A one-way hashing algorithm that produces a 128-bit hash. Both MD5 and
MD5
are variations on MD4 and are designed to strengthen the security of the MD4 hashing algorithm.
SHA-1
framework. Also used for message authentication in SNMP v.2. MD5 verifies the integrity of the
communication, authenticates the origin, and checks for timeliness.
considered to be slightly faster than SHA-1.
media dependent interface.
MDI
media dependent interface crossover.
MDIX
A message digest is created by a hash algorithm, such as
message digest
message integrity.
OL-20339-01
Internet
is more secure than MD4 and MD5. Cisco uses hashes for authentication within the
address is divided into network, subnet, and host parts. The
MD5 or SHA-1, that is used for ensuring
Cisco ASA 5500 Series Configuration Guide using ASDM
Glossary
SHA-1
IPsec
MD5 has a smaller digest and is
GL-11