ccna 3 | bits

Spanning Tree Design

Nov 20, 2011 · 2 min read · ccna 3 port-blocking configure cisco stp info

Optimizing STP topology. In the first topology an Access Layer switch is designated as a root bridge for the entire network. Choosing a good root bridge should be based on: Performance Redundancy Packets should travel from an access layer switch to a distribution layer switch to a core layer switch without the …

WLAN

Apr 8, 2011 · 10 min read · ccna 3 wlan

PAN LAN MAN WAN Standards Bluetooth802.15.3 802.11 802.11802.16802.20 GSM, CDMA, Satellite Speed < 1 Mbps 11 to 54 Mbps 10-100+ Mbps 10 Kbps-2 Mbps Range Short Medium Medium-Long Long Applications Peer-to-PeerDevice-to-Device EnterpriseNetworks Last Mile Access Mobile DataDevices Comparing a WLAN to L…

Spanning Tree Protocol IEEE 802.1d

Mar 28, 2011 · 3 min read · ccna 3 stp

Ce este STP Protocol de L2.5 OSI Standardizat (Radia Perlmann) “Obsolete” (are neajunsuri) Rolul STP a) Descoperirea legaturilor logice redundante dintr-o inter-retea de L2 urmata de blocarea redundantei b) Descoperirea modificarilor de topologie din aceasi inter-retea Grafic 1 Terminologie: 1. Root Bridge Se deriva d…

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…

VTP

Mar 14, 2011 · 5 min read · ccna 3 vtp port security VLAN cisco info

VLAN Trunking Protocol 1) Lab anterior Cerinte: Configurare manuala interfete de tip trunk Configurare manuala interfete de tip access Port-Security Maximum 3 1 static 2 dynamic Violation Protect Toate VLAN-urile la fiecare switch VLAN-uri: VLAN Spatiu de adrese Adrese 10 10.0.0.0/24 C1 –.1 C7 –.7 …

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 …

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…

CCNA 3 Intro

Feb 20, 2011 · 5 min read · ccna 3

Punctele au fost:1)structura switchuluia)hardwareb)software2)moduri de operare, promptere3)configurarea de baza a switchului4)laboratorLa partea de comenzi au fost asa:show versionshow mac address-table [dynamic][static]show ip redirectsshow interface statusshow arpconfigurarea vlan-ului(c)#interface vlan 1(c)#ip addr…