日语单词的音调

日语学习的过程中,单词发音一直是一个很大的问题——同样假名搭配不同的音调将产生完全不同的意思,比如:かみ可以表示神,也可能是纸的意思。在很多

Huawei is providing outsourcing management services for SPs

I recently had a chance to speak with a supervisor, who is called such by his colleagues, from Huawei. He mentioned that Huawei was trying doing outsourcing IT management service for SP customers. This approaching reminds me that Cisco is also thriving to bring management service into China. I don’t think this is a coincidence that two biggest companies in the same industry are doing the same. The only difference is that Huawei is expecting to have a proliferation out of China mainland, while Cisco is trying to bring this concept into China.

Real World Network Simulation

Why we need network simulation As a network engineer, I have to spend a lot of time in the lab or test environment on testing concepts, configuration, troubleshooting and so on. This is also true for people whose work environment is related to a network such as developers, DBAs. The problem here is that the lab sometimes so perfect that it cannot emulate the real world flaws like latency, packet loss, re-order or bandwidth limitation.

Controller discussion is excessive, we need more about other aspects

Ever since SDN has been revealed and considered as the future in the industry by the public. There are abundant discussions about OpenFlow, ACI, NSX, etc. The main focus right now is the software part including southern API, northern API and more. The discussion about those new features which SDN could bring us has instigated the aspires of this Old-thought-with-new-implementation for network fellows who have been suffered for a long time for the poor management & controllability of network entities.

如何给予负面评价

我们在工作中,无论处于什么位置,都会或多或少的需要评价别人的工作。唯一的区别在于,有些是需要用口头或者文字的方式进行表达,有些只用存在心里。

Scenarios of IGMP Snooping Multicast Forwarding

I’ve discussed what is IGMP snooping and its forwarding rules for different packets in my last post. I just want to give some typical scenarios in IGMP snooping for your better understanding. Scenario 1: Switch forwarding multicast traffic to a multicast router and hosts In the topology shown above, the switch acting as a pure L2 device interconnects multicast router, which directly connects to the Source A for multicast group 239.

这些不是我们的竞争优势

Jason Cohen 在近期的文章中提出一些经常被误解为竞争优势的项目。我总结了一下,也加上了自己的看法: 我们有功能X。除非对手不能模仿,或者被模仿后,客户和

Some words for CCIE candidates

I had been planned to be a game/software developer since 10, but I’ve jumped into another industry — network — right after my graduation from college. After dedication of my most of time, I finally have passed three tracks of it – R&S, SP, Sec. Within these years, a lot of people in this industry or not have talked and discussion about CCIE with me. I’d like to share my personal ideas of CCIE about WHAT, WHY and HOW.

What is ABR

ABR is short for Adaptive Bitrate Streaming, which is a technique used in streaming multimedia over networks. While in the past most video streaming technologies utilized streaming protocols such RTP with RTSP, today’s adaptive streaming technologies are almost exclusively based on HTTP and designed to work efficiently over large distributed HTTP networks such as the Internet. It works by detecting a user’s bandwidth in real time and adjusting the quality