<s>
The	O
table	O
below	O
lists	O
information	B-General_Concept
technology	I-General_Concept
initialisms	O
and	O
acronyms	O
in	O
common	O
and	O
current	O
usage	O
.	O
</s>
<s>
These	O
acronyms	O
are	O
used	O
to	O
discuss	O
LAN	B-General_Concept
,	O
internet	O
,	O
WAN	O
,	O
routing	O
and	O
switching	O
protocols	O
,	O
and	O
their	O
applicable	O
organizations	O
.	O
</s>
<s>
The	O
table	O
contains	O
only	O
current	O
,	O
common	O
,	O
non-proprietary	O
initialisms	O
that	O
are	O
specific	O
to	O
information	B-General_Concept
technology	I-General_Concept
.	O
</s>
<s>
Normative	O
Reference	O
ACK	B-Protocol
Acknowledgement	O
Transport	O
and	O
other	O
layers	O
TCP/IP	B-Protocol
,	O
for	O
example	O
.	O
</s>
<s>
RFC	O
793	O
ACL	O
Access	O
control	O
list	O
Security	O
,	O
application	O
layer	O
Access	O
control	O
list	O
,	O
Cisco	O
overview	O
ADSL	O
Asymmetric	O
digital	O
subscriber	O
line	O
Telecom	O
ITU-T	O
G.992.5	O
Annex	O
M	O
,	O
for	O
example	O
AES	B-Algorithm
Advanced	B-Algorithm
Encryption	I-Algorithm
Standard	I-Algorithm
Security	O
U.S.	O
FIPS	O
PUB	O
197	O
ANSI	O
American	O
National	O
Standards	O
Institute	O
Organization	O
ANSI	O
API	B-General_Concept
Application	B-Application
Programming	I-Application
Interface	I-Application
SoftwareAPI	O
ARP	O
Address	O
Resolution	O
Protocol	O
Link	O
layer	O
RFC	O
1122	O
ATM	O
Asynchronous	O
Transfer	O
Mode	O
Telecom	O
ATM	O
cell	O
description	O
BGP	B-Protocol
Border	B-Protocol
Gateway	I-Protocol
Protocol	I-Protocol
(	O
routing	O
protocol	O
)	O
Application	O
layer	O
,	O
Routers	O
RFC	O
4271	O
BSS	B-General_Concept
Basic	B-General_Concept
service	I-General_Concept
set	I-General_Concept
(	O
Wi-Fi	O
)	O
Wireless	O
IEEE	O
Std	O
802.11-2007	O
CAT	B-Protocol
Category	O
(	O
e.g.	O
</s>
<s>
CAT-5	B-Protocol
cable	I-Protocol
)	O
Physical	O
layer	O
ANSI/TIA/EIA	O
-568-B.1-2001	O
CCITT	O
(	O
obs	O
.	O
)	O
</s>
<s>
Standards	O
organization	O
that	O
has	O
been	O
replaced	O
by	O
ITU-T	O
Organization	O
ITU-T	O
CHAP	B-Protocol
Challenge-Handshake	B-Protocol
Authentication	I-Protocol
Protocol	I-Protocol
(	O
PPP	B-Protocol
)	O
Security	O
,	O
telecom	O
RFC	O
1994	O
CIDR	B-Protocol
Classless	B-Protocol
Inter-Domain	I-Protocol
Routing	I-Protocol
Architecture	O
RFC	O
1518	O
RFC	O
1519	O
CIR	B-Protocol
Committed	B-Protocol
Information	I-Protocol
Rate	I-Protocol
(	O
Frame	B-Protocol
Relay	I-Protocol
)	O
Telecom	O
RFC	O
1490	O
RFC	O
1973	O
RFC	O
2427	O
CLI	O
Command	O
line	O
interpreter	O
Hardware	O
Catalyst	O
6500	O
Series	O
Command	O
Reference	O
,	O
7.6	O
,	O
for	O
example	O
CPE	O
Customer	O
premises	O
equipment	O
Telecom	O
Telecom	O
GlossaryCPUCentral	O
processing	O
UnitMicroprocessorWikipedia	O
CRC	O
Cyclic	O
redundancy	O
check	O
Link	O
and	O
other	O
layers	O
24	O
References	O
here	B-Protocol
.	I-Protocol
</s>
<s>
CRC-16-CCITT	O
Cyclic	O
redundancy	O
check	O
(	O
X.25	B-Protocol
,	O
HDLC	O
)	O
Link	O
layers	O
Reference	O
on	O
CRC	O
page.CRTCathode	O
Ray	O
Tube	O
Television	O
set	O
,	O
Computer	O
MonitorCathode	O
ray	O
tube	O
CSMA/CA	O
Carrier	O
sense	O
multiple	O
access	O
/	O
collision	O
avoidance	O
Wireless	O
IEEE	O
Std	O
802.11	O
Downloads	O
CSMA/CD	O
Carrier	O
sense	O
multiple	O
access	O
/	O
collision	O
detection	O
Physical	O
layer	O
IEEE	O
Std	O
802.3TM-2002	O
CSU/DSU	O
Channel	O
service	O
unit	O
/	O
data	O
service	O
unit	O
Telecom	O
Telecom	O
Glossary	O
CMOS	B-Device
Complementary	O
metal-oxide	O
semiconductor	O
Utility	O
CMOS	B-Device
DAM	O
Database	O
activity	O
monitoring	O
Security	O
Database	O
activity	O
monitoring	O
DAM	O
Digital	O
asset	O
management	O
Internet	O
Layer	O
Digital	O
asset	O
management	O
DCE	O
Data	O
communications	O
equipment	O
Telecom	O
Telecom	O
Glossary	O
DEC	O
(	O
obs	O
.	O
)	O
</s>
<s>
DES	B-Algorithm
Data	B-Algorithm
Encryption	I-Algorithm
Standard	I-Algorithm
(	O
obs	O
.	O
</s>
<s>
See	O
AES	B-Algorithm
)	O
Security	O
Federal	O
Information	O
Processing	O
Standard	O
(	O
FIPS	O
)	O
FIPS-46-3	O
DHCP	B-Protocol
Dynamic	B-Protocol
Host	I-Protocol
Configuration	I-Protocol
Protocol	I-Protocol
Application	O
layer	O
,	O
Internet	O
Layer	O
RFC	O
2131	O
and	O
others	O
DIMM	B-General_Concept
Dual	B-General_Concept
In-line	I-General_Concept
Memory	I-General_Concept
Module	I-General_Concept
Hardware	O
DIMM	B-General_Concept
DNS	B-Protocol
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
Application	O
layer	O
Over	O
30	O
RFCs	O
here	B-Protocol
.	I-Protocol
</s>
<s>
DRAM	O
Dynamic	O
random-access	B-Architecture
memory	I-Architecture
Hardware	O
Dynamic	O
random-access	B-Architecture
memory	I-Architecture
DSL	O
Digital	O
subscriber	O
line	O
Telecom	O
Telecom	O
Glossary	O
DSLAM	B-Protocol
Digital	B-Protocol
subscriber	I-Protocol
line	I-Protocol
access	I-Protocol
multiplexer	I-Protocol
Telecom	O
Telecom	O
Glossary	O
(	O
proposed	O
)	O
DTE	O
Data	O
Terminal	O
Equipment	O
Telecom	O
Telecom	O
Glossary	O
DMI	B-Device
Desktop	B-Device
Management	I-Device
Interface	I-Device
Utility	O
Desktop	B-Device
Management	I-Device
Interface	I-Device
EHA	O
Ethernet	O
Hardware	O
Address	O
(	O
MAC	B-Protocol
address	O
)	O
Link	O
layer	O
IEEE	O
Std	O
802	O
IEEE	O
OUI	O
Assignments	O
EIA	O
Electronics	O
Industry	O
Alliance	O
Organization	O
EIA	O
EIGRP	B-Protocol
Enhanced	B-Protocol
Interior	I-Protocol
Gateway	I-Protocol
Routing	I-Protocol
Protocol	I-Protocol
Internet	O
Layer	O
Cisco	O
Doc	O
ID	O
:	O
16406	O
EMAC	O
Ethernet	O
Media	B-Protocol
Access	I-Protocol
Control	I-Protocol
Link	O
Layer	O
EOF	O
End	O
Of	O
Frame	O
(	O
HDLC	O
,	O
etc	O
.	O
)	O
</s>
<s>
Link	O
layer	O
HDLC	O
framing	O
ESS	O
Extended	O
service	B-General_Concept
set	I-General_Concept
(	O
Wi-Fi	O
group	O
)	O
Wireless	O
IEEE	O
Std	O
802.11-2007	O
FCC	O
Federal	O
Communications	O
Commission	O
(	O
US	O
)	O
Organization	O
US	O
FCC	O
FCS	B-Protocol
Frame	B-Protocol
check	I-Protocol
sequence	I-Protocol
(	O
Ethernet	O
)	O
Link	O
layer	O
Ethernet	O
Frame	O
IEEE	O
Std	O
802.3	O
FDDI	B-Protocol
Fiber	B-Protocol
Distributed	I-Protocol
Data	I-Protocol
Interface	I-Protocol
Link	O
layer	O
American	O
National	O
Standards	O
Institute	O
X3T9.5	O
(	O
now	O
X3T12	O
)	O
,	O
ISO/IEC	O
9314-x	O
FTP	B-Protocol
File	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
Application	O
layer	O
RFC	O
959	O
and	O
others	O
GBIC	B-Protocol
Gigabit	B-Protocol
interface	I-Protocol
converter	I-Protocol
Hardware	O
Seagate	O
Specification	O
gbps	O
Gigabit	O
per	O
second	O
Physical	O
layer	O
Gigabit	O
per	O
second	O
GEPOF	B-Application
Gigabit	O
Ethernet	O
(	O
over	O
)	O
Plastic	B-Application
Optical	I-Application
Fiber	I-Application
Physical	O
layer	O
IEEE	O
P802.3bv	O
GMAC	O
Gigabit	O
Ethernet	O
Media	B-Protocol
Access	I-Protocol
Control	I-Protocol
Link	O
Layer	O
HDLC	O
High-level	O
Data	O
Link	O
Control	O
Link	O
layer	O
ISO	O
13239	O
HTTP	B-Protocol
HyperText	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
Application	O
layer	O
W3C	O
Change	O
History	O
for	O
HTTP	B-Protocol
HTTPS	B-Protocol
HyperText	B-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
Secure	O
Transport	O
and	O
other	O
layers	O
SSL	O
3.0	O
Specification	O
IaaS	B-General_Concept
Infrastructure	B-General_Concept
as	I-General_Concept
a	I-General_Concept
service	I-General_Concept
Cloud	O
Services	O
IaaS	B-General_Concept
Microsoft	O
Docs	O
IANA	O
Internet	O
Assigned	O
Number	O
Authority	O
Organization	O
IANA	O
ICaaS	O
Integration	O
Capability	O
as	O
a	O
Service	O
Organization	O
ICaaS	O
ICMP	B-Protocol
Internet	B-Protocol
Control	I-Protocol
Message	I-Protocol
Protocol	I-Protocol
Internet	O
Layer	O
RFC	O
792	O
IDF	O
Intermediate	O
distribution	O
frame	O
Physical	O
layer	O
Structured	O
cabling	O
or	O
Telecom	O
Glossary	O
IDS	O
Intrusion	O
Detection	O
System	O
Security	O
Wikipedia	B-General_Concept
IEEE	O
Institute	O
for	O
Electrical	O
and	O
Electronic	O
Engineers	O
Organization	O
IEEE	O
IETF	O
Internet	O
Engineering	O
Task	O
Force	O
Organization	O
IETF	O
IMAP	B-Protocol
Internet	B-Protocol
Message	I-Protocol
Access	I-Protocol
Protocol	I-Protocol
Application	O
layer	O
RFC	O
3501	O
IP	B-Protocol
Internet	B-Protocol
Protocol	I-Protocol
Internet	O
Layer	O
RFC	O
791	O
RFC	O
1606	O
IPS	O
Intrusion	O
prevention	O
system	O
Security	O
"	O
NIST	O
-	O
Guide	O
to	O
Intrusion	O
Detection	O
and	O
Prevention	O
Systems	O
(	O
IDPS	O
)	O
"	O
.	O
</s>
<s>
IS-IS	B-Protocol
Intermediate	B-Protocol
System	I-Protocol
to	I-Protocol
Intermediate	I-Protocol
System	I-Protocol
(	O
routing	O
protocol	O
)	O
Internet	O
Layer	O
ISO/IEC	O
10589:2002	O
ISDN	B-Protocol
Integrated	B-Protocol
Services	I-Protocol
Digital	I-Protocol
Network	I-Protocol
Telecom	O
IEC	O
Area	O
716-xx	O
ISP	O
Internet	O
service	O
provider	O
Telecom	O
Telecom	O
Glossary	O
ITU-T	O
International	O
Telecommunication	O
Union	O
Organization	O
http://www.itu.int	O
kbps	O
Kilobit	O
per	O
second	O
Physical	O
layer	O
Kilobit	O
per	O
second	O
LACP	O
Link	O
Aggregation	O
Control	O
Protocol	O
Data	O
link	O
layer	O
LAN	B-General_Concept
Local	B-General_Concept
area	I-General_Concept
network	I-General_Concept
Link	O
and	O
other	O
layers	O
Telecom	O
Glossary	O
LAPB	O
Link	O
Access	O
Procedure	O
,	O
Balanced	O
(	O
x.25	B-Protocol
)	O
Telecom	O
ITU-T	O
Recommendation	O
X.222	O
LAPF	O
Link-access	O
procedure	O
for	O
Frame	B-Protocol
Relay	I-Protocol
Telecom	O
RFC	O
1490	O
LLC	O
Logical	O
link	O
control	O
Link	O
layer	O
Telecom	O
Glossary	O
MAC	B-Protocol
Media	B-Protocol
access	I-Protocol
control	I-Protocol
Link	O
layer	O
IEEE	O
Std	O
802.3	O
and	O
802.11	O
,	O
for	O
example	O
MAM	O
Media	O
access	O
management	O
(	O
related	O
to	O
Digital	O
asset	O
management	O
)	O
Internet	O
layer	O
Wikipedia	B-General_Concept
MAN	O
Metropolitan	O
area	O
network	O
Telecom	O
Telecom	O
Glossary	O
Mbps	B-Application
Megabits	O
per	O
second	O
Physical	O
layer	O
Megabit_per_second	O
MC	O
Multiple	O
choice	O
IT	B-General_Concept
Professional	I-General_Concept
Certification	O
About	O
certification	O
exams	O
MDF	B-Device
Main	B-Device
distribution	I-Device
frame	I-Device
Physical	O
layer	O
Glossary	O
See	O
also	O
Structured	O
cabling	O
MIB	O
Management	O
information	O
base	O
(	O
SNMP	B-Protocol
)	O
Application	O
layer	O
RFC	O
3418	O
MII	B-Protocol
Media-independent	B-Protocol
Interface	I-Protocol
Link	O
layer	O
MoCA	O
Multimedia	O
over	O
Coax	O
Alliance	O
Organization	O
Multimedia	O
over	O
Coax	O
Alliance	O
MPLS	B-Protocol
Multiprotocol	B-Protocol
Label	I-Protocol
Switching	I-Protocol
network	O
technology	O
MTU	B-Protocol
Maximum	B-Protocol
Transmission	I-Protocol
Unit	I-Protocol
Multiple	O
layers	O
NAC	O
Network	O
access	O
control	O
Link	O
and	O
other	O
layers	O
IEEE	O
802.1x	O
NAS	B-Application
Network-attached	B-Application
storage	I-Application
Hardware	O
/	O
Storage	O
Computer	B-General_Concept
data	I-General_Concept
storage	I-General_Concept
NAT	B-Protocol
Network	B-Protocol
Address	I-Protocol
Translation	I-Protocol
Internet	O
Layer	O
Cisco	O
Internet	B-Protocol
Protocol	I-Protocol
Journal	O
:	O
A	O
look	O
Inside	O
Network	B-Protocol
Address	I-Protocol
Translators	I-Protocol
NBMA	B-Protocol
Non-Broadcast	O
Multiple	O
Access	O
(	O
e.g.	O
</s>
<s>
Frame	B-Protocol
Relay	I-Protocol
ATM	O
)	O
Telecom	O
See	O
ATM	O
,	O
Frame	B-Protocol
Relay	I-Protocol
and	O
X.25	B-Protocol
,	O
for	O
examples	O
.	O
</s>
<s>
NIC	B-Protocol
Network	B-Protocol
Interface	I-Protocol
Card	I-Protocol
Physical	O
layer	O
Telecom	O
Glossary	O
NRZ	B-Protocol
Non-return-to-zero	B-Protocol
Physical	O
layer	O
Federal	O
Standard	O
1037C	O
NRZI	O
Non-return	B-Protocol
to	I-Protocol
zero	I-Protocol
inverted	O
Physical	O
layer	O
Federal	O
Standard	O
1037C	O
NVRAM	B-General_Concept
Non-volatile	B-General_Concept
RAM	I-General_Concept
Hardware	O
Sample	O
vendor	O
data	O
here	O
OSI	O
Open	O
System	O
Interconnect	O
(	O
joint	O
ISO	O
and	O
ITU	O
standard	O
)	O
Organization	O
ISO/IEC	O
9594-5:2005	O
Open	O
Systems	O
Interconnection	O
Protocol	O
Specifications	O
OSPF	B-Protocol
Open	B-Protocol
Shortest	I-Protocol
Path	I-Protocol
First	I-Protocol
(	O
routing	O
protocol	O
)	O
Internet	O
Layer	O
RFC	O
2238	O
OUI	O
Organization	O
Unique	O
Identifier	O
Link	O
and	O
other	O
layers	O
IEEE	O
OUI	O
Assignments	O
PAP	B-Protocol
Password	B-Protocol
authentication	I-Protocol
protocol	I-Protocol
Security	O
RFC	O
1334	O
PAT	O
Port	O
address	O
translation	O
Internet	O
Layer	O
RFC	O
1918	O
PaaS	B-Application
Platform	B-Application
as	I-Application
a	I-Application
service	I-Application
Cloud	O
Computing/Service	O
Platform	B-Application
as	I-Application
a	I-Application
service	I-Application
PC	B-Device
Personal	B-Device
computer	I-Device
(	O
host	O
)	O
Hardware	O
PIM	B-Application
Personal	B-Application
information	I-Application
manager	I-Application
Software	O
category	O
PCM	B-Algorithm
Pulse-code	B-Algorithm
modulation	I-Algorithm
Physical	O
layer	O
ITU-T	O
G.711	O
PDU	B-Protocol
Protocol	B-Protocol
data	I-Protocol
unit	I-Protocol
(	O
such	O
as	O
segment	O
,	O
packet	O
,	O
frame	O
,	O
etc	O
.	O
)	O
</s>
<s>
Multiple	O
layers	O
Fed	O
Std	O
1037C	O
POP3	B-Protocol
Post	B-Protocol
Office	I-Protocol
Protocol	I-Protocol
,	O
version	O
3	O
Application	O
layer	O
RFC	O
1939	O
POP	O
Point	O
of	O
presence	O
Telecom	O
Telecom	O
Glossary	O
POST	B-Device
Power-on	B-Device
self	I-Device
test	I-Device
Hardware	O
Cisco	O
Catalyst	O
2800	O
User	O
Guide	O
,	O
for	O
example	O
POTS	O
Plain	O
old	O
telephone	O
service	O
Telecom	O
Telecom	O
Glossary	O
PPP	B-Protocol
Point-to-point	B-Protocol
Protocol	I-Protocol
Telecom	O
RFC	O
1661	O
PPTP	B-Protocol
Point-to-Point	B-Protocol
Tunneling	I-Protocol
Protocol	I-Protocol
Telecom	O
RFC	O
2637	O
PTT	O
Public	O
Telephone	O
and	O
Telegraph	O
Telecom	O
Telecom	O
Glossary	O
or	O
Free	O
Dictionary	O
PVST	O
Per-VLAN	O
Spanning	O
Tree	O
Link	O
layer	O
Cisco	O
's	O
introduction	O
to	O
Spanning	B-Protocol
Tree	I-Protocol
Protocol	I-Protocol
RADIUS	B-Protocol
Remote	B-Protocol
Authentication	I-Protocol
Dial-In	I-Protocol
User	I-Protocol
Service	I-Protocol
Security	O
RFC	O
2865	O
RAM	B-Architecture
Random	B-Architecture
Access	I-Architecture
Memory	I-Architecture
Physical	O
layer	O
Telecom	O
Glossary	O
RARP	B-Protocol
Reverse	B-Protocol
ARP	I-Protocol
Link	O
layer	O
RFC	O
903	O
RIMM	O
Rambus	O
In-line	O
Memory	O
Module	O
Hardware	O
Wikipedia	B-General_Concept
RFC	O
Request	O
for	O
Comments	O
Multiple	O
layers	O
IETF	O
's	O
RFC	O
Index	O
RIP	B-Protocol
Routing	B-Protocol
Information	I-Protocol
Protocol	I-Protocol
Internet	O
Layer	O
RFC	O
2453	O
,	O
for	O
RIP	B-Protocol
version	O
2	O
RLL	B-Protocol
Run-Length	B-Protocol
Limited	I-Protocol
Physical	O
layer	O
RLL	B-Protocol
is	O
used	O
in	O
a	O
wide	O
range	O
of	O
encodings	O
.	O
</s>
<s>
ROM	B-Device
Read-Only	B-Device
Memory	I-Device
Hardware	O
Telecom	O
Glossary	O
RSTP	O
Rapid	O
Spanning	B-Protocol
Tree	I-Protocol
Protocol	I-Protocol
Link	O
layer	O
IEEE	O
802.1w	O
-	O
Rapid	O
Reconfiguration	O
of	O
Spanning	O
Tree	O
RTP	B-Protocol
Real-time	B-Protocol
Transport	I-Protocol
Protocol	I-Protocol
Application	O
layer	O
RFC	O
3550	O
SaaS	B-Architecture
Software	B-Architecture
as	I-Architecture
a	I-Architecture
service	I-Architecture
Cloud	O
Computing/Service	O
Software	B-Architecture
as	I-Architecture
a	I-Architecture
service	I-Architecture
Microsoft	O
Docs	O
SDLC	B-Protocol
Synchronous	B-Protocol
Data	I-Protocol
Link	I-Protocol
Control	I-Protocol
Link	O
layer	O
Cisco	O
Technology	O
Handbook	O
:	O
SDLC	B-Protocol
and	O
Derivatives	O
SDN	O
Software	O
Defined	O
Networking	O
Architecture	O
Software-defined	O
networking	O
SFD	O
Start-of-frame	O
delimiter	O
(	O
Ethernet	O
,	O
HDLC	O
,	O
etc	O
.	O
)	O
</s>
<s>
Link	O
layer	O
IEEE	O
802.3	O
(	O
Ethernet	O
)	O
,	O
or	O
RFC	O
2687	O
(	O
HDLC	O
)	O
,	O
for	O
examples	O
SFP	B-Protocol
Small	B-Protocol
form-factor	I-Protocol
pluggable	I-Protocol
Hardware	O
Seagate	O
Specification	O
S-HTTP	B-Protocol
Secure	B-Protocol
HTTP	I-Protocol
(	O
rarely	O
used	O
)	O
Transport	O
and	O
other	O
layers	O
RFC	O
2660	O
See	O
also	O
https	B-Protocol
SLARP	B-Protocol
Serial	O
Line	O
ARP	O
(	O
Address	O
Resolution	O
Protocol	O
)	O
Link	O
and	O
other	O
layers	O
Archived	O
Cisco	O
Serial	O
Line	O
Encapsulation	O
extension	O
SLIP	B-Protocol
Serial	B-Protocol
Line	I-Protocol
Internet	I-Protocol
Protocol	I-Protocol
(	O
obs	O
.	O
)	O
</s>
