switchport

3 posts tagged “switchport”

• Key Elements of 802.3/Ethernet Networks

  Mar 23, 2011 · 13 min read  · ccna 3 ethernet switchport info

  CSMA/CD -Carrier Sense If a device detects a signal from another device, it waits for a specified amount of time before attempting to transmit. "listening before transmit" mode -Multi-access Using a shared medium to communicate -Collision Detection When a device is in listening mode, it can detect when a collision occ…

  
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• VLAN

  Mar 6, 2011 · 8 min read  · troubleshoot ccna 3 VLAN switchport

  

  Virtual Local Area Network VLAN=domeniu de broadcast=spatiu de adrese IP Nu trebuiesc porturi consecutive pe switch. By default toate porturile fac parte dintr-un singur domeniu de broadcast Este o separare logica a switch-ului - 2950 (maxim 64 de VLAN-uri) - 2960 (maxim 255 VLAN-uri) VLAN-ul default pentru interfete …

  
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• Port security

  Feb 27, 2011 · 4 min read  · ccna 3 port security configure switchport cisco commands

  

  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 a) Default nu e pornit Port Security Tipuri de atacuri oprite de Port Security - MAC address spoofing - schimbarea MAC-ului asignat de vendor cu un altul - Se aplica doar pen…

  
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