(I think it's very helpful for beginners. Both are quite basic.
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23.2 access control list experiment doc
23.3 extended access control list acl doc
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25.1 basic configuration of switch doc
25.2 switch VLAN setting doc
25.3 single arm routing (boundary routing) experiment doc
25.4 switch VTP configuration doc
25.5 switch STP configuration doc
25.6 use STP to realize load balancing doc
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26.7 port aggregation doc
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CCNP routing knowledge five technology analysis selection doc
Cisco routing protocol questions and answers (Chinese) doc
A simple scheme of Cisco router security configuration doc
Cisco router configuration manual doc
EIGRP configuration details doc
F-R configuration doc
IGRP configuration doc
IGRP configuration details doc
IP
Loopback
Nat configuration doc
OSPF experiment - configuration of OSPF in nBMA (non broadcast multipoint reachable) network doc
OSPF experiment - single zone OSPF configuration doc
OSPF experiment - multi area OSPF configuration doc
OSPF configuration doc
OSPF configuration details doc
Rip configuration details doc
STP spanning tree serialization 4: how to configure STP doc
STP configuration analysis doc....)