'Henning schulzrinne dept' presentation slideshows

SIP Security

SIP Security. Henning Schulzrinne Dept. of Computer Science Columbia University July 2002. Overview. System model Threats and promises Approaches lower-layer (L3, L4) application-layer borrowed and modified ? HTTP Digest new, SIP-specific short-term vs. long-term

657 views • 50 slides

420 views • 27 slides

364 views • 27 slides

Henning Schulzrinne Dept. of Computer Science Columbia University

365 views • 20 slides

Measurement and Evaluation of ENUM Server Performance

Measurement and Evaluation of ENUM Server Performance. Charles Shen and Henning Schulzrinne Dept. of Computer Science, Columbia University, New York, NY. Motivation. ENUM translates E.164 No. to URIs Built upon DNS infrastructure Query response time

320 views • 16 slides

Internet Telephony (VoIP)

301 views • 11 slides

sed and awk

sed and awk. Henning Schulzrinne Dept. of Computer Science Columbia University. sed: string replacement. Line-oriented tool for pattern matching and replacement (stream editor) Not really a programming language (cf. awk) E.g., apply same change to lots of source files

459 views • 7 slides

NATs (Network Address Translators)

NATs (Network Address Translators). Henning Schulzrinne Dept. of Computer Science Columbia University Fall 2003. NATs. Network address translation = local, LAN-specific address space translated to small number of globally routable IP addresses Motivation: scarce address space

363 views • 5 slides