如果各位正在上CCNA的課程或是在準備CCNA考試，但是平時可能手邊沒有設備可以練習的話，可以先考慮使用Packet Tracer來練習，以下是相關資源可以下載的地方：
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Packet Tracer is a powerful network simulator that can be utilized in training for CCNATM and CCNP TM certification exam by allowing students to create networks with an almost unlimited number of devices and to experience troubleshooting without having to buy real Cisco TMrouters or switches.
The current version of Packet Tracer supports an array of simulated Application layer protocols (HTTP, DNS, …), as well as basic routing with RIP, OSPF, and EIGRP, to the extent required by the current CCNATM curriculum. With the introduction of version 5.3, several new features were added, including BGP, which is part of the CCNP TMcurriculum.
While Packet Tracer aims to provide a realistic simulation of functional networks, the application itself utilizes only a small number of features found within the actual hardware running a current Cisco IOSTM.
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CCNA labs - LAN Switching
| Lab 1 : Basic switch setup |  |  |
| Lab 2 : Configuring switch interfaces | | |
| Lab 3 : VLAN and VTP configuration | | |
| Lab 4 : Port security | | |
| Lab 5 : Troubleshooting | Coming soon |
CCNA labs - IP Routing
| Lab 6 : Basic router setup | |
| Lab 7 : Static routes | Coming soon |
| Lab 8 : RIP v2 | Coming soon |
| Lab 9 : Troubleshooting | Coming soon |
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CCNA labs - WAN
| Lab 10 : Configuring serial links | Coming soon | |
| Lab 11 : HDLC | | |
| Lab 12 : PPP | | |
| Lab 13 : Frame Relay | | |
CCNP labs
| Lab 14 : Radius authentication | |
| Lab 15 : Configuring Etherchannel | |
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