06-Jun-2021
An Internet Speed Test tool was added. You may use this tool to test the Internet speed at home or in office.
09-May-2021
Added Youtube Movie, mainly explain the topics of network associate certificate.
10-Jan-2021
Just read some articles for Quantum Network and do some sharing here.
01-Jun-2019
An introduction to VPN Server, and also the steps of implementation of VPN server.
19-May-2019
A very practical tutorial that teach you how to Reset Password of a router or switch.
02-Mar-2019
A network simulator called EVE-NG is introduced.
09-Dec-2018
Introduce the difference between GRE over IPSec and IPSec over GRE.
18-Nov-2018
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!
07-Nov-2018
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。
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04-Nov-2018
A very simple tutorial to introduce the theory and setting of NTP.
28-Oct-2018
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.
21-Sep-2018
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.
12-Aug-2018
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!
22-Jul-2018
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.
01-Jul-2018
Third article for QoS which talking about the qos setting on switch.
07-May-2018
Second article for QoS, including topics like Classification, Marking, Queuing and Congestion Avoidance.
17-Apr-2018
Try to write some tutorials for QoS, start from Bandwidth Management.
24-Mar-2018
I have published the IGMP tutorial today. I suggest to build up a good knowledge of PIM before you go to IGMP.
01-Mar-2018
Readers complain that the content of jannet.hk is lacking of entry level articles 🤢. I try to write topic like: Console Cable this time.
18-Feb-2017
Happy Chinese New Year! The new article of MBGP involves topics like PIM, AD and BGP, Better to have a revision before reading. 😀
20-Jan-2018
The first article in 2018 is the basic concept of IP Address Version 6 and also the interconnectivty of IPv4 and IPv6.
26-Dec-2017
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.
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20-Dec-2017
An article related to the technology of Bitcoin.
17-Dec-2017
Add advanced topic like aggregate address, route injection and dampening to BGP.
22-Oct-2017
Posted an article for Optimization of network connection delay. No English version at this moment. 😀
14-Oct-2017
OSPF tutorial has been updated. Summarization and OSPF optimization is added in the article.
28-Sep-2017
EIGRP tutorial has been updated. Named Mode configuration is added. I also explain the concept of wide metric.
17-Sep-2017
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.
05-Sep-2017
Routing Information Protocol (RIP) is updated. Default-information Originate and Router Filtering have been added.
09-Jul-2017
DMVPN has been completed, please make sure that you understood Tunnel, Routing Protocol and IPSec before taking this challenge.
02-Jul-2017
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.
25-Jun-2017
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.
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10-Jun-2017
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.
29-May-2017
The third topic of Network Hacking, Wired Equivalent Privacy (WEP) Attack。
20-May-2017
The second topic of Network Hacking, Spanning Tree Protocol Attack。
14-May-2017
I will introduce some hacking tools that come with Kali Linux. The first article is MAC Address Table Attack.
02-Apr-2017
End-to-end Delay should be a network 101 course. Finally, I have written it.
29-Mar-2017
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.
09-Mar-2017
I just want to introduce a book……,Systems One. That’s it.
07-Mar-2017
The last chapter of Spanning Tree,Multiple Spanning Tree Protocol. You must know STP and RSTP very well before you study MSTP.
27-Feb-2017
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.
19-Feb-2017
Rapid Spanning Tree Protocol have been finished. Make sure you understand STP before reading RSTP.
05-Feb-2017
One of my colleagues who are studying CCNA ask me questions about Interface, so I write Network Interface, hope it helps.
29-Jan-2017
Revamp version of the webpage is finished.
15-Jan-2017
After Copper Cable, we have Fiber Cable. No exam questions for this topic.
08-Jan-2017
Copper Cable finished. No exam questions for this topic.
02-Jan-2017
Happy New Year. I wrote EtherChannel (PAgP and LACP) today.
18-Dec-2016
X’mas is coming, I wrote an easy topic: Dynamic Trunking Protocol (DTP).
11-Dec-2016
VLAN Trunking Protocol (VTP) Completed, easy topic.
02-Dec-2016
The basic of network: Virtual LAN, that is VLAN.
27-Oct-2016
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.
23-Oct-2016
Graphical Network Simulator 3 (GNS3) have been updated. The lastest version of GNS3 support IOU. It can simulate Router and Multi-layer Switch now.
02-Jan-2015
Happy New Year! IOU Web is finished. L3 Switch can be simlatated. Take a look!
28-Dec-2014
Add Peer Group, Community and Backdoor in BGP.
29-Nov-2014
Just found a very good article that talking about Kerberos.
24-Nov-2014
Take a look to the configuration of IPSEC VPN.
11-Nov-2014
Just learn Cryptography in Master course. Very interesting!
11-Oct-2014
Interesting topic: SLA.
02-Oct-2014
Wrote MSDP today. But there are some problems when testing SA Filter.
01-Oct-2014
DIY Cisco LAB for studying.
20-Sep-2014
Wrote an article for Administrative Distance.
20-Aug-2014
I have spent some time to study PPP today.
16-Aug-2014
STP finished.
08-Aug-2014
A piece of cake: CDP.
01-Aug-2014
Easy topic: RIP .
29-Jul-2014
A very relate topic: Port Security.
28-Jul-2014
EIGRP finished.
22-Jul-2014
Horrible topic. Use lots of time to write this: OSPF.
18-Jul-2014
An introduction to DHCP.
17-Jul-2014
Embedded Packet Capture (EPC) suitable for troubleshooting.
16-Jul-2014
Wrote a short topic today: ARP.
13-Jul-2014
Writeing OSPF actually but found some problems in network type. So, finish the Frame Relay first.
23-May-2014
Just finihsed my course exam and re-install my computer. Write an article for GNS3.
09-Feb-2014
MPLS finished. Not only theory but also practical.
25-Jan-2014
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