Rfc	6901
Title	JavaScript Object Notation (JSON) Pointer
Author	P. Bryan, Ed., K. Zyp, M. Nottingham, Ed.
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6902
Title	JavaScript Object Notation (JSON) Patch
Author	P. Bryan, Ed., M. Nottingham, Ed.
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6903
Title	Additional Link Relation Types
Author	J. Snell
Date	March 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6904
Title	Encryption of Header Extensions in the Secure Real-time Transport Protocol (SRTP)
Author	J. Lennox
Date	April 2013
Format:	TXT, HTML
Updates	RFC3711
Status:	PROPOSED STANDARD
Rfc	6905
Title	Requirements for Operations, Administration, and Maintenance (OAM) in Transparent Interconnection of Lots of Links (TRILL)
Author	T. Senevirathne, D. Bond, S. Aldrin, Y. Li, R. Watve
Date	March 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6906
Title	The 'profile' Link Relation Type
Author	E. Wilde
Date	March 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6907
Title	Use Cases and Interpretations of Resource Public Key Infrastructure (RPKI) Objects for Issuers and Relying Parties
Author	T. Manderson, K. Sriram, R. White
Date	March 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6908
Title	Deployment Considerations for Dual-Stack Lite
Author	Y. Lee, R. Maglione, C. Williams, C. Jacquenet, M. Boucadair
Date	March 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6909
Title	IPv4 Traffic Offload Selector Option for Proxy Mobile IPv6
Author	S. Gundavelli, Ed., X. Zhou, J. Korhonen, G. Feige, R. Koodli
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6910
Title	Completion of Calls for the Session Initiation Protocol (SIP)
Author	D. Worley, M. Huelsemann, R. Jesske, D. Alexeitsev
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6911
Title	RADIUS Attributes for IPv6 Access Networks
Author	W. Dec, Ed., B. Sarikaya, G. Zorn, Ed., D. Miles, B. Lourdelet
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6912
Title	Principles for Unicode Code Point Inclusion in Labels in the DNS
Author	A. Sullivan, D. Thaler, J. Klensin, O. Kolkman
Date	April 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6913
Title	Indicating Fax over IP Capability in the Session Initiation Protocol (SIP)
Author	D. Hanes, G. Salgueiro, K. Fleming
Date	March 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6914
Title	SIMPLE Made Simple: An Overview of the IETF Specifications for Instant Messaging and Presence Using the Session Initiation Protocol (SIP)
Author	J. Rosenberg
Date	April 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6915
Title	Flow Identity Extension for HTTP-Enabled Location Delivery (HELD)
Author	R. Bellis
Date	April 2013
Format:	TXT, HTML
Updates	RFC6155
Status:	PROPOSED STANDARD
Rfc	6916
Title	Algorithm Agility Procedure for the Resource Public Key Infrastructure (RPKI)
Author	R. Gagliano, S. Kent, S. Turner
Date	April 2013
Format:	TXT, HTML
Also	BCP0182
Status:	BEST CURRENT PRACTICE
Rfc	6917
Title	Media Resource Brokering
Author	C. Boulton, L. Miniero, G. Munson
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6918
Title	Formally Deprecating Some ICMPv4 Message Types
Author	F. Gont, C. Pignataro
Date	April 2013
Format:	TXT, HTML
Obsoletes	RFC1788
Updates	RFC0792, RFC0950
Status:	PROPOSED STANDARD
Rfc	6919
Title	Further Key Words for Use in RFCs to Indicate Requirement Levels
Author	R. Barnes, S. Kent, E. Rescorla
Date	1 April 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6920
Title	Naming Things with Hashes
Author	S. Farrell, D. Kutscher, C. Dannewitz, B. Ohlman, A. Keranen, P. Hallam-Baker
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6921
Title	Design Considerations for Faster-Than-Light (FTL) Communication
Author	R. Hinden
Date	1 April 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6922
Title	The application/sql Media Type
Author	Y. Shafranovich
Date	April 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6923
Title	MPLS Transport Profile (MPLS-TP) Identifiers Following ITU-T Conventions
Author	R. Winter, E. Gray, H. van Helvoort, M. Betts
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6924
Title	Registration of Second-Level URN Namespaces under "ietf"
Author	B. Leiba
Date	April 2013
Format:	TXT, HTML
Updates	RFC2648
Status:	INFORMATIONAL
Rfc	6925
Title	The DHCPv4 Relay Agent Identifier Sub-Option
Author	B. Joshi, R. Desetti, M. Stapp
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6926
Title	DHCPv4 Bulk Leasequery
Author	K. Kinnear, M. Stapp, R. Desetti, B. Joshi, N. Russell, P. Kurapati, B. Volz
Date	April 2013
Format:	TXT, HTML
Updated by	RFC7724
Status:	PROPOSED STANDARD
Rfc	6927
Title	Variants in Second-Level Names Registered in Top-Level Domains
Author	J. Levine, P. Hoffman
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6928
Title	Increasing TCP's Initial Window
Author	J. Chu, N. Dukkipati, Y. Cheng, M. Mathis
Date	April 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6929
Title	Remote Authentication Dial In User Service (RADIUS) Protocol Extensions
Author	A. DeKok, A. Lior
Date	April 2013
Format:	TXT, HTML
Updates	RFC2865, RFC3575, RFC6158
Status:	PROPOSED STANDARD
Rfc	6930
Title	RADIUS Attribute for IPv6 Rapid Deployment on IPv4 Infrastructures (6rd)
Author	D. Guo, S. Jiang, Ed., R. Despres, R. Maglione
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6931
Title	Additional XML Security Uniform Resource Identifiers (URIs)
Author	D. Eastlake 3rd
Date	April 2013
Format:	TXT, HTML
Obsoletes	RFC4051
Obsoleted by	RFC9231
Status:	PROPOSED STANDARD
Rfc	6932
Title	Brainpool Elliptic Curves for the Internet Key Exchange (IKE) Group Description Registry
Author	D. Harkins, Ed.
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6933
Title	Entity MIB (Version 4)
Author	A. Bierman, D. Romascanu, J. Quittek, M. Chandramouli
Date	May 2013
Format:	TXT, HTML
Obsoletes	RFC4133
Status:	PROPOSED STANDARD
Rfc	6934
Title	Applicability of the Access Node Control Mechanism to Broadband Networks Based on Passive Optical Networks (PONs)
Author	N. Bitar, Ed., S. Wadhwa, Ed., T. Haag, H. Li
Date	June 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6935
Title	IPv6 and UDP Checksums for Tunneled Packets
Author	M. Eubanks, P. Chimento, M. Westerlund
Date	April 2013
Format:	TXT, HTML
Updates	RFC2460
Status:	PROPOSED STANDARD
Rfc	6936
Title	Applicability Statement for the Use of IPv6 UDP Datagrams with Zero Checksums
Author	G. Fairhurst, M. Westerlund
Date	April 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6937
Title	Proportional Rate Reduction for TCP
Author	M. Mathis, N. Dukkipati, Y. Cheng
Date	May 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6938
Title	Deprecation of BGP Path Attributes: DPA, ADVERTISER, and RCID_PATH / CLUSTER_ID
Author	J. Scudder
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6939
Title	Client Link-Layer Address Option in DHCPv6
Author	G. Halwasia, S. Bhandari, W. Dec
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6940
Title	REsource LOcation And Discovery (RELOAD) Base Protocol
Author	C. Jennings, B. Lowekamp, Ed., E. Rescorla, S. Baset, H. Schulzrinne
Date	January 2014
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6941
Title	MPLS Transport Profile (MPLS-TP) Security Framework
Author	L. Fang, Ed., B. Niven-Jenkins, Ed., S. Mansfield, Ed., R. Graveman, Ed.
Date	April 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6942
Title	Diameter Support for the EAP Re-authentication Protocol (ERP)
Author	J. Bournelle, L. Morand, S. Decugis, Q. Wu, G. Zorn
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6943
Title	Issues in Identifier Comparison for Security Purposes
Author	D. Thaler, Ed.
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6944
Title	Applicability Statement: DNS Security (DNSSEC) DNSKEY Algorithm Implementation Status
Author	S. Rose
Date	April 2013
Format:	TXT, HTML
Obsoleted by	RFC8624
Updates	RFC2536, RFC2539, RFC3110, RFC4034, RFC4398, RFC5155, RFC5702, RFC5933
Status:	PROPOSED STANDARD
Rfc	6945
Title	Definitions of Managed Objects for the Resource Public Key Infrastructure (RPKI) to Router Protocol
Author	R. Bush, B. Wijnen, K. Patel, M. Baer
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6946
Title	Processing of IPv6 "Atomic" Fragments
Author	F. Gont
Date	May 2013
Format:	TXT, HTML
Updates	RFC2460, RFC5722
Status:	PROPOSED STANDARD
Rfc	6947
Title	The Session Description Protocol (SDP) Alternate Connectivity (ALTC) Attribute
Author	M. Boucadair, H. Kaplan, R. Gilman, S. Veikkolainen
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6948
Title	Some Measurements on World IPv6 Day from an End-User Perspective
Author	A. Keranen, J. Arkko
Date	July 2013
Format:	TXT, PDF, HTML
Status:	INFORMATIONAL
Rfc	6949
Title	RFC Series Format Requirements and Future Development
Author	H. Flanagan, N. Brownlee
Date	May 2013
Format:	TXT, HTML
Updates	RFC2223
Status:	INFORMATIONAL
Rfc	6950
Title	Architectural Considerations on Application Features in the DNS
Author	J. Peterson, O. Kolkman, H. Tschofenig, B. Aboba
Date	October 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6951
Title	UDP Encapsulation of Stream Control Transmission Protocol (SCTP) Packets for End-Host to End-Host Communication
Author	M. Tuexen, R. Stewart
Date	May 2013
Format:	TXT, HTML
Updated by	RFC8899
Status:	PROPOSED STANDARD
Rfc	6952
Title	Analysis of BGP, LDP, PCEP, and MSDP Issues According to the Keying and Authentication for Routing Protocols (KARP) Design Guide
Author	M. Jethanandani, K. Patel, L. Zheng
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6953
Title	Protocol to Access White-Space (PAWS) Databases: Use Cases and Requirements
Author	A. Mancuso, Ed., S. Probasco, B. Patil
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6954
Title	Using the Elliptic Curve Cryptography (ECC) Brainpool Curves for the Internet Key Exchange Protocol Version 2 (IKEv2)
Author	J. Merkle, M. Lochter
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6955
Title	Diffie-Hellman Proof-of-Possession Algorithms
Author	J. Schaad, H. Prafullchandra
Date	May 2013
Format:	TXT, HTML
Obsoletes	RFC2875
Status:	PROPOSED STANDARD
Rfc	6956
Title	Forwarding and Control Element Separation (ForCES) Logical Function Block (LFB) Library
Author	W. Wang, E. Haleplidis, K. Ogawa, C. Li, J. Halpern
Date	June 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6957
Title	Duplicate Address Detection Proxy
Author	F. Costa, J-M. Combes, Ed., X. Pougnard, H. Li
Date	June 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6958
Title	RTP Control Protocol (RTCP) Extended Report (XR) Block for Burst/Gap Loss Metric Reporting
Author	A. Clark, S. Zhang, J. Zhao, Q. Wu, Ed.
Date	May 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6959
Title	Source Address Validation Improvement (SAVI) Threat Scope
Author	D. McPherson, F. Baker, J. Halpern
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6960
Title	X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSP
Author	S. Santesson, M. Myers, R. Ankney, A. Malpani, S. Galperin, C. Adams
Date	June 2013
Format:	TXT, HTML
Obsoletes	RFC2560, RFC6277
Updates	RFC5912
Updated by	RFC8954, RFC9654
Status:	PROPOSED STANDARD
Rfc	6961
Title	The Transport Layer Security (TLS) Multiple Certificate Status Request Extension
Author	Y. Pettersen
Date	June 2013
Format:	TXT, HTML
Obsoleted by	RFC8446
Status:	PROPOSED STANDARD
Rfc	6962
Title	Certificate Transparency
Author	B. Laurie, A. Langley, E. Kasper
Date	June 2013
Format:	TXT, HTML
Obsoleted by	RFC9162
Status:	EXPERIMENTAL
Rfc	6963
Title	A Uniform Resource Name (URN) Namespace for Examples
Author	P. Saint-Andre
Date	May 2013
Format:	TXT, HTML
Also	BCP0183
Status:	BEST CURRENT PRACTICE
Rfc	6964
Title	Operational Guidance for IPv6 Deployment in IPv4 Sites Using the Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)
Author	F. Templin
Date	May 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6965
Title	MPLS Transport Profile (MPLS-TP) Applicability: Use Cases and Design
Author	L. Fang, Ed., N. Bitar, R. Zhang, M. Daikoku, P. Pan
Date	August 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6967
Title	Analysis of Potential Solutions for Revealing a Host Identifier (HOST_ID) in Shared Address Deployments
Author	M. Boucadair, J. Touch, P. Levis, R. Penno
Date	June 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6968
Title	FCAST: Object Delivery for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) Protocols
Author	V. Roca, B. Adamson
Date	July 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6969
Title	OSPFv3 Instance ID Registry Update
Author	A. Retana, D. Cheng
Date	July 2013
Format:	TXT, HTML
Updates	RFC5838
Status:	PROPOSED STANDARD
Rfc	6970
Title	Universal Plug and Play (UPnP) Internet Gateway Device - Port Control Protocol Interworking Function (IGD-PCP IWF)
Author	M. Boucadair, R. Penno, D. Wing
Date	July 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6971
Title	Depth-First Forwarding (DFF) in Unreliable Networks
Author	U. Herberg, Ed., A. Cardenas, T. Iwao, M. Dow, S. Cespedes
Date	June 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6972
Title	Problem Statement and Requirements of the Peer-to-Peer Streaming Protocol (PPSP)
Author	Y. Zhang, N. Zong
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6973
Title	Privacy Considerations for Internet Protocols
Author	A. Cooper, H. Tschofenig, B. Aboba, J. Peterson, J. Morris, M. Hansen, R. Smith
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6974
Title	Applicability of MPLS Transport Profile for Ring Topologies
Author	Y. Weingarten, S. Bryant, D. Ceccarelli, D. Caviglia, F. Fondelli, M. Corsi, B. Wu, X. Dai
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6975
Title	Signaling Cryptographic Algorithm Understanding in DNS Security Extensions (DNSSEC)
Author	S. Crocker, S. Rose
Date	July 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6976
Title	Framework for Loop-Free Convergence Using the Ordered Forwarding Information Base (oFIB) Approach
Author	M. Shand, S. Bryant, S. Previdi, C. Filsfils, P. Francois, O. Bonaventure
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6977
Title	Triggering DHCPv6 Reconfiguration from Relay Agents
Author	M. Boucadair, X. Pougnard
Date	July 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6978
Title	A TCP Authentication Option Extension for NAT Traversal
Author	J. Touch
Date	July 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6979
Title	Deterministic Usage of the Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)
Author	T. Pornin
Date	August 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6980
Title	Security Implications of IPv6 Fragmentation with IPv6 Neighbor Discovery
Author	F. Gont
Date	August 2013
Format:	TXT, HTML
Updates	RFC3971, RFC4861
Status:	PROPOSED STANDARD
Rfc	6981
Title	A Framework for IP and MPLS Fast Reroute Using Not-Via Addresses
Author	S. Bryant, S. Previdi, M. Shand
Date	August 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6982
Title	Improving Awareness of Running Code: The Implementation Status Section
Author	Y. Sheffer, A. Farrel
Date	July 2013
Format:	TXT, HTML
Obsoleted by	RFC7942
Status:	EXPERIMENTAL
Rfc	6983
Title	Models for HTTP-Adaptive-Streaming-Aware Content Distribution Network Interconnection (CDNI)
Author	R. van Brandenburg, O. van Deventer, F. Le Faucheur, K. Leung
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6984
Title	Interoperability Report for Forwarding and Control Element Separation (ForCES)
Author	W. Wang, K. Ogawa, E. Haleplidis, M. Gao, J. Hadi Salim
Date	August 2013
Format:	TXT, HTML
Updates	RFC6053
Status:	INFORMATIONAL
Rfc	6985
Title	IMIX Genome: Specification of Variable Packet Sizes for Additional Testing
Author	A. Morton
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6986
Title	GOST R 34.11-2012: Hash Function
Author	V. Dolmatov, Ed., A. Degtyarev
Date	August 2013
Format:	TXT, HTML
Updates	RFC5831
Status:	INFORMATIONAL
Rfc	6987
Title	OSPF Stub Router Advertisement
Author	A. Retana, L. Nguyen, A. Zinin, R. White, D. McPherson
Date	September 2013
Format:	TXT, HTML
Obsoletes	RFC3137
Updated by	RFC8770
Status:	INFORMATIONAL
Rfc	6988
Title	Requirements for Energy Management
Author	J. Quittek, Ed., M. Chandramouli, R. Winter, T. Dietz, B. Claise
Date	September 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6989
Title	Additional Diffie-Hellman Tests for the Internet Key Exchange Protocol Version 2 (IKEv2)
Author	Y. Sheffer, S. Fluhrer
Date	July 2013
Format:	TXT, HTML
Updates	RFC5996
Status:	PROPOSED STANDARD
Rfc	6990
Title	RTP Control Protocol (RTCP) Extended Report (XR) Block for MPEG-2 Transport Stream (TS) Program Specific Information (PSI) Independent Decodability Statistics Metrics Reporting
Author	R. Huang, Q. Wu, H. Asaeda, G. Zorn
Date	August 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6991
Title	Common YANG Data Types
Author	J. Schoenwaelder, Ed.
Date	July 2013
Format:	TXT, HTML
Obsoletes	RFC6021
Status:	PROPOSED STANDARD
Rfc	6992
Title	Routing for IPv4-Embedded IPv6 Packets
Author	D. Cheng, M. Boucadair, A. Retana
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6993
Title	Instant Messaging and Presence Purpose for the Call-Info Header Field in the Session Initiation Protocol (SIP)
Author	P. Saint-Andre
Date	July 2013
Format:	TXT, HTML
Status:	INFORMATIONAL
Rfc	6994
Title	Shared Use of Experimental TCP Options
Author	J. Touch
Date	August 2013
Format:	TXT, HTML
Status:	PROPOSED STANDARD
Rfc	6996
Title	Autonomous System (AS) Reservation for Private Use
Author	J. Mitchell
Date	July 2013
Format:	TXT, HTML
Updates	RFC1930
Also	BCP0006
Status:	BEST CURRENT PRACTICE
Rfc	6997
Title	Reactive Discovery of Point-to-Point Routes in Low-Power and Lossy Networks
Author	M. Goyal, Ed., E. Baccelli, M. Philipp, A. Brandt, J. Martocci
Date	August 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL
Rfc	6998
Title	A Mechanism to Measure the Routing Metrics along a Point-to-Point Route in a Low-Power and Lossy Network
Author	M. Goyal, Ed., E. Baccelli, A. Brandt, J. Martocci
Date	August 2013
Format:	TXT, HTML
Status:	EXPERIMENTAL