Category: Networking

SRTP sdp msg: v=0 o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5 s=SDP Seminar i=A Seminar on the session description protocol u=http://www.example.com/seminars/sdp.pdf e=j.doe@example.com (Jane Doe) c=IN IP4 161.44.17.12/127 t=2873397496 2873404696 m=video 51372…

How SSH2 works: (1) When a TCP connection is made by a client, the server responds with the protocol versions it supports. If the client can match one of the…

  The combination of Diffie-Hellman and the use of ephemeral session keys are what enables “Forward Secrecy”: even if an attacker gains access to the server’s private key they are…

BGP: run on tcp 179, path vector protocol,  65K routes eBGP: append AS_PATH iBGP:  ( the same AS number),  iBGP need full mesh, thus could use Route Reflector (RR, need to…

What is Apache Kafka? ( big picture)  I found the article http://www.confluent.io/blog/stream-data-platform-1/ ( from Jay Kreps) presented a very good big picture on what Kafka suppose to do: you can…

Why MPLS? Networks with more stringent QoS requirements might use IPSec-over-Internet for non-real-time traffic and MPLS for real-time and mission-critical traffic Basic MPLS, how it works: A good explanation is…

It is quite easy to setup a ipv6 testbed at home now. (1) setup linux ipv6 router apt-get install radvd  # on a vm or real box debian and copy the…