An Internet Speed Test tool was added. You may use this tool to test the Internet speed at home or in office.
Added Youtube Movie, mainly explain the topics of network associate certificate.
Just read some articles for Quantum Network and do some sharing here.
An introduction to VPN Server, and also the steps of implementation of VPN server.
A very practical tutorial that teach you how to Reset Password of a router or switch.
A network simulator called EVE-NG is introduced.
Introduce the difference between GRE over IPSec and IPSec over GRE.
Network runs very well without NetFlow. But you will ask why there is no NetFlow when you have to troubleshoot a bandwidth congestion issue. Check the tutorial of NetFlow now!
This is my 3rd time to publish article in Admin Network & Security. The article is talking about Cisco VTP, please visit and subscribe at http://www.admin-magazine.com。
A very simple tutorial to introduce the theory and setting of NTP.
The setting of IPSec is so comlicated. GETVPN is born to simplifier the configuration of remote site. But we need to have basic knowledge of IPSec before setting up a GETVPN key server.
I think the topic, Network Address Translation, is not easy to explain. And there are some more configuration under NAT that I hope it can be added in the future.
Obviously, First Hop Redundancy Protocol is an easy topic compared to other protocols. You may be already familiar with HSRP, VRRP and GLBP, just take a look for revision!
Authentication, Authorization, Accounting (AAA) is only a small topic. Not much score earned in the exam but we it is always be used in production network. Let’s take a look.
Third article for QoS which talking about the qos setting on switch.
Second article for QoS, including topics like Classification, Marking, Queuing and Congestion Avoidance.
Try to write some tutorials for QoS, start from Bandwidth Management.
I have published the IGMP tutorial today. I suggest to build up a good knowledge of PIM before you go to IGMP.
Readers complain that the content of jannet.hk is lacking of entry level articles 🤢. I try to write topic like: Console Cable this time.
Happy Chinese New Year! The new article of MBGP involves topics like PIM, AD and BGP, Better to have a revision before reading. 😀
The first article in 2018 is the basic concept of IP Address Version 6 and also the interconnectivty of IPv4 and IPv6.
An article that related to port security is posted in the recent issue of Admin Network & Security Magazine. Please visit and subscribe at http://www.admin-magazine.com if interested.
An article related to the technology of Bitcoin.
Add advanced topic like aggregate address, route injection and dampening to BGP.
Posted an article for Optimization of network connection delay. No English version at this moment. 😀
OSPF tutorial has been updated. Summarization and OSPF optimization is added in the article.
EIGRP tutorial has been updated. Named Mode configuration is added. I also explain the concept of wide metric.
Policy Based Routing (PBR) is added. It is not a difficult topic if you have already understood the theory of routing protocol and routing decision.
Routing Information Protocol (RIP) is updated. Default-information Originate and Router Filtering have been added.
DMVPN has been completed, please make sure that you understood Tunnel, Routing Protocol and IPSec before taking this challenge.
Originally, I want to write an article for DMVPN. But it is so strange to enter DMVPN without tunnel basic knowledge. Finally, I think it is better to write Generic Routing Encapsulation (GRE) first.
Just write an article about Spanning Tree Protocol for a magazine, check it out if you are interested: http://www.admin-magazine.com (It seems that you get 1 free electronic version now). The subscribe fee of Admin Network & Security is not expensive and the content is quite useful.
Orginally, I want to focus on the VLAN Hopping Attack. Unfortunately, it is proved that the attack is already not worked to the recent IOS version……😥 So, the Virtual LAN (VLAN) Attack by using DTP is introuced only.
The third topic of Network Hacking, Wired Equivalent Privacy (WEP) Attack。
The second topic of Network Hacking, Spanning Tree Protocol Attack。
I will introduce some hacking tools that come with Kali Linux. The first article is MAC Address Table Attack.
End-to-end Delay should be a network 101 course. Finally, I have written it.
Routing Decision Completed. I have tried my best to make is simple and basic. But it still involves some Routing Protocol concept and Route Map configuration may make new comers feel confusing.
I just want to introduce a book……,Systems One. That’s it.
The last chapter of Spanning Tree,Multiple Spanning Tree Protocol. You must know STP and RSTP very well before you study MSTP.
I have taken a Data Center course and one of the topic is Power Supply. It is really fun! It makes me write the topic Power Supply that is not related to the exam.
Rapid Spanning Tree Protocol have been finished. Make sure you understand STP before reading RSTP.
One of my colleagues who are studying CCNA ask me questions about Interface, so I write Network Interface, hope it helps.
Revamp version of the webpage is finished.
After Copper Cable, we have Fiber Cable. No exam questions for this topic.
Copper Cable finished. No exam questions for this topic.
Happy New Year. I wrote EtherChannel (PAgP and LACP) today.
X’mas is coming, I wrote an easy topic: Dynamic Trunking Protocol (DTP).
VLAN Trunking Protocol (VTP) Completed, easy topic.
The basic of network: Virtual LAN, that is VLAN.
Someone complains that it does not have any CCNA article in jannet.hk, I will try to write more basic topic in the future : P . Just finished one: IP Address Version 4.
Graphical Network Simulator 3 (GNS3) have been updated. The lastest version of GNS3 support IOU. It can simulate Router and Multi-layer Switch now.
Happy New Year! IOU Web is finished. L3 Switch can be simlatated. Take a look!
Add Peer Group, Community and Backdoor in BGP.
Just found a very good article that talking about Kerberos.
Take a look to the configuration of IPSEC VPN.
Just learn Cryptography in Master course. Very interesting!
Interesting topic: SLA.
Wrote MSDP today. But there are some problems when testing SA Filter.
DIY Cisco LAB for studying.
Wrote an article for Administrative Distance.
I have spent some time to study PPP today.
A piece of cake: CDP.
Easy topic: RIP .
A very relate topic: Port Security.
Horrible topic. Use lots of time to write this: OSPF.
An introduction to DHCP.
Embedded Packet Capture (EPC) suitable for troubleshooting.
Wrote a short topic today: ARP.
Writeing OSPF actually but found some problems in network type. So, finish the Frame Relay first.
Just finihsed my course exam and re-install my computer. Write an article for GNS3.
MPLS finished. Not only theory but also practical.
I am preparing for CCIE Lab Exam. I would like to write articles for Cisco knowledge so that I would remember things that I have learned. I have just finished BGP.
Jan Ho 2021-08-07