what is upstream?

Answer 1

In geography, upstream means literally towards the source of a stream or river, against the normal direction of water flow.

Upstream in computing is the speed at which data can be transferred from the client to the server (uploading). This differs greatly from downstream not only in theory and usage, but also in that upstream speeds are usually at a premium. Whereas downstream is important to the average home user for purposes of downloading content, uploads are used mainly for web server applications and similar processes where the sending of data is critical. ADSL and Cable modems are asymmetric, thereby rendering the upstream speed to be much lower than that of its downstream. Symmetric connections such as SDSL and T1, however, offer identical upstream and downstream speeds.

Upstream has gained great relevance with the use of P2P software.

It also refers to a relationship between ISPs.

If a node A in the Internet is closer (fewer hops away) from the Internet backbone than a node B, then A is said to be upstream of B or conversely, B is downstream of A. Related to this is the idea of upstream providers. An upstream provider is usually a large ISP that provides Internet access to a local ISP.

Answer 2

Upstream is up the stream - that is, you travel from any point on a river course towards the source of the river. It is the opposite the direction of natural flow of a river.

Answer 3

A location that is in the direction of being against the normal current. I say normal, since during floodstages or other natural occurrences, water may backflow, producing a temporary reversed current.

Answer 4

The water in a river going downstream .... opposite is upstram

Answer 5

Salmon.