How does uplink and downlink work?
This signal is called an uplink. The transmission has a powerful high frequency which is referred to as a "Gigahertz (GHz) range signal". The satellite, in orbit about the Earth, receives the signal and then transmits it back to earth stations. This transmission signal back to earth is called a downlink.
In telecommunications, the term uplink refers to a wireless connection made from the ground to a communications satellite orbiting the Earth. The same term is sometimes used in computer networking and refers to a (wired or wireless) connection from a ?local area network (LAN) to a wide area network (WAN).
- In the absence of an uplink port, you can connect two hubs or switches together by using MDI-X ports, but you must use a crossover cable to do so. If you are using the port to connect a computer, make sure that it is set to MDI-X. If you're connecting to another hub or switch, make sure that it's set to MDI.
- Physical Ethernet adapters serve as bridges between virtual and physical networks. In VMware Infrastructure, they are called uplinks, and the virtual ports connected to them are called uplink ports. A single host may have a maximum of uplinks, which may be on one switch or distributed among a number of switches.
- VMkernel is a POSIX-like operating system developed by VMware. The VMkernel is the liaison between virtual machines (VMs) and the physical hardware that supports them. VMware calls VMkernel a microkernel because it runs on bare metal, directly on VMware ESX hosts.
So generally frequency for uplink is kept higher than the downlink.There is greater attenuation due to rain when the signal frequency is high. because uplink to satellite has more power since we can generate more power on ground.
- Possible communication satellites may be active or passive. An active satellite is one which has transmitting equipment aboard, such as a transponder, a device which receives a signal from Earth, amplifies it, and retransmits the same signal back to Earth (either immediately or after a delay).
- Collisions are rare because when a satellite is launched, it is placed into an orbit designed to avoid other satellites. But orbits can change over time. And the chances of a crash increase as more and more satellites are launched into space.
- The space station looks like a fast-moving plane in the sky, but it will be seen as a steady – not blinking – white pinpoint of light. Typically it will be the brightest object in the night sky (except for the Moon). It is bright enough that it can even be seen from the middle of a city!
An uplink port generally means a port used that connects toward the core of the network. A downlink port generally mean the converse. In this particular usage, the switch's downlink ports are dual speed copper ports. The uplink ports are gig and copper/fiber capable.
- Downlink is a telecommunication term pertaining to data which is sent out or downwards from a higher level or portion of a network. Traditionally, it refers to a satellite communications process where data is sent from a satellite down to an earthbound terminal or device, hence the word "down."
- A faster port speed means that more your data and web content will be able to reach the internet quicker. 100 Mb/s port speed is standard on all PingPipe dedicated servers. 100 Mb/s is great for most gameserver, VoIP, and website hosting.
- The communication going from a satellite to ground is called downlink, and when it is going from ground to a satellite it is called uplink. If there is only an uplink happening, this communication is called upload.
Updated: 4th October 2018