what is dwdm in telecom

What is magnetic beads?Magnetic Beads have high resistivity and magnetic permeability, which is equivalent to a series of resistance and inductance, but the resistance value and Inductance Value Change with frequency. It has better high-frequency filtering characteristics than ordinary inductor, and presents resistance at high frequencies, so it can maintain a hi

1. What is "service cluster "? What is "enterprise-level development "?Now that EJB is for "service cluster" and "enterprise-level development", we have to talk about what is the so-cal

Dual-line dual-IP address enables dual-line access to the backbone networks of China Telecom and China Netcom. The servers hosted in the data center enable dual-line access of China Telecom and China Netcom, by enabling users of China Telecom and China Netcom to connect to the server at a very high speed, the access speed between China

1. What is "service cluster "? What is "enterprise-level development "?Now that EJB is for "service cluster" and "enterprise-level development", we have to talk about what is the so-cal

, the city people no longer need to be in a bit bitter force queuing to buy a ticket. CDN can be understood as distributed in each county train ticket consignment point, users browsing the site, CDN will choose a nearest to the user Cdn Edge node to respond to user requests, so the request of Hainan Mobile users will not go all the way to Beijing Telecom Room server (assuming the source station deployed in Beijing

1. What is the difference between the free communication function and the micro-letter telephone? Micro-mail phone mainly through the operator data channel (3G/4G or fixed network to WiFi) to achieve free call, in the operator 3G/4G network actually also need to pay mobile data costs. And the other side must install the micro-letter phone application, and is the

Love to listen to the characteristics of 4G "Telecom 4G users love to listen to 4G in the province of total free flow" [1], love to listen to 4G is the sky Wing love music combined with 4G high-speed features of the network, specifically forMusic enthusiasts carefully crafted music player, so that you listen unimpeded. Ultra-high quality of a large amount of songs, King days after the classic songs, popula

) network, this version is more suitable for unicom users to buy. Model CDMA version of IPhone6 (A1549), IPhone6 Plus (A1522), to support the CDMA network, because the United States law does not prohibit 4G phone lock network, so in the domestic use of mobile 2G, Unicom 2G, 3G, telecom 3G and 4G (FDD ) network, more suitable for domestic unicom and telecommunications users to buy.In addition, although the

website operation and network operation is only one word difference, so it is very easy to confuse. Website operation refers to the product management, content operation, content update, marketing and other related operation management of Internet site. In a broad sense, including Web site planning, product development, network marketing, customer service and many other links. In the narrow sense, especial

open very slow will feel the network problem, and too much cache will cause the browser to open the search when there are slow problems. How to: Replace the system or clean the browser cache. 7, the use of software (computer Butler) 7-1. First check the network line is normal, the router or the cat is damaged. This part suggests you find a telecom operator's

We all know that the domain name is Webmaster site brand, site content, traffic, etc. are closely related to the domain name, colleagues a good domain name for the site's optimization and operation of the promotion is beneficial, and its impact is very deep. But if you have a large station group, the change of domain name for you

Differences between MAC address and IP address The MAC address is used to define the location of the network device. In the OSI model, the third layer of the network layer is responsible for the IP address, and the second layer of data link is responsible for MAC addresses. Therefore, the IP address of a computer can be changed dynamically, and the MAC address

What is wi-fi) The IEEE 802.11b wireless network specification is a variant of the IEEE 802.11 Network specification. The maximum bandwidth is 11 Mbps. when the signal is weak or there is interference, the bandwidth can be adjuste

What is ESB? There is no detailed definition: ESB (Enterprise Service Bus) is the product of combining traditional middleware technologies with XML, web services, and other technologies. ESB provides the most basic connection hub in the network and is a necessary element for

A dial-up Internet computer is used as a PHP server and can be accessed using 127.0.0.1. what if I cannot access the page using an IP address or virtual domain name? A dial-up Internet computer is used as a PHP server and can be accessed using 127.0.0.1. what if I cannot access the page using an IP address or virtual d

"screenshot, because the martial arts progress of Xiao Yan is a complex process that is inseparable from beginning to end. After a long period of time, the Western Asian Telecom and the comments agreed that the "vibration screenshot" will be used as the official name of our non-profit community, this name is protected

$70 per month, which is the cost paid by a Kansas user for Google Fiber's Mbps network service. Many may curse large telecommunications companies such as Time Warner Cable and Comcast's largest cable system company in the United States. They rely on the monopoly of the telecommunications market to accept money. More people will be confused about the question: How does Google provide Mbps network services at such a low price? Chattanooga previously cre

Do I need to enable DHCP for the community or village network? The following is a technical analysis on personal opinions. My personal suggestion is to enable DHCP, but some people ask why China Telecom and China Unicom do not enable DHCP? When DHCP is enabled, you can see that the boot speed