Sunday, February 27, 2011

Port security

Securitatea la switch de nivelul de tip acces

a) Port security

b) port protected

c) Port blocked

d) Acces la switch fara parola

e) Storm control

Monday, February 21, 2011

Distance Vector Routing Protocols


The meaning of Distance Vector:
A router using distance vector routing protocols knows 2 things:
Distance to final destination.
Vector, or direction, traffic should be directed.

CCNA 3 Intro

Thursday, February 17, 2011



In functie de cerinte CISCO are mai multe serii

Pentru Provider Core
7200, 7600, GSR-12000, CSR-1, CSR-3

Pentru Provider Edge
2800/2900, 3800/3900

Pentru nivelul Acces

Monday, February 07, 2011

Frame/Packet Format

IP Packet


Internet Protocol (IP) Packet Format

The Internet Protocol specified in RFC 791 defines the IP packet format. The IP packet header has specific fields that contain information about the packet and about the sending and receiving hosts. Below is a list of the fields in the IP header and a brief description for each one.

Sunday, February 06, 2011


Open Shortest Path First

  • protocol de rutare link state
  • direct competitor pentru EIGRP (proprietar CISCO)
  • Protocol de rutare classless
  • Scalabil prin folosirea de zone