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17 votes

What is the meaning / origin of the terms north-south and east-west traffic?

I found the definitions from Microsoft Technet very useful: East-West – East-West refers to traffic flows that occur between devices within a datacenter. During convergence for example, routers ...
randominstanceOfLivingThing's user avatar
14 votes

What does the naming convention for Ethernet standards mean: 1000BASE-T, BASE-TX, BASE-SX, etc.? What is the meaning of the components of the name?

BASE indicates baseband signaling - there is no modulated carrier, the frequency starts near zero and extends to a certain cut-off frequency. BROAD indicates broadband modulation - there is a wide ...
Zac67's user avatar
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11 votes

What does the naming convention for Ethernet standards mean: 1000BASE-T, BASE-TX, BASE-SX, etc.? What is the meaning of the components of the name?

The first number represents the speed. If the next part is "BASE", then it is baseband. If it is "BROAD", then it is broadband. This is the original meaning of baseband/broadband, not the government ...
Ron Maupin's user avatar
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9 votes

What is the meaning / origin of the terms north-south and east-west traffic?

It has also been, in my years of understanding, general network traffic descriptors: North/South - Meaning traffic coming into and out of the network into Internet space, i.e in and out of edge ...
Americanmcneil's user avatar
8 votes
Accepted

Is an ONT a modem?

Short answer: no, an ONT is no modem. Modem is short for MOdulator/DEModulator and the term is only used for three device classes: telephone modems, DSL modems, and cable modems (thx Cody). These ...
Zac67's user avatar
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7 votes
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bind to specific address

This terminology comes from network programming: A computer typically has one IP address for each network card. A computer may have multiple IP addresses for a network card (this is even the normal ...
Martin Rosenau's user avatar
6 votes

What is the meaning of the CS and EE abbreviations in these sentences?

I believe that CS stands for Computer Science, and EE stands for Electrical Engineering. What it means is that electrical engineering looks at the physical circuit properties, while computer science ...
Ron Maupin's user avatar
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6 votes
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What's the difference between Frame, Packet and Payload?

A Frame is a combination of the L2 header and the Data being carried A Packet is a combination of the L3 header and the Data being carried. In either case, the Data being carried is the payload of ...
Eddie's user avatar
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5 votes
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Significance of Bisection Bandwidth, Full Bisection Bandwidth, Subscription and their differences

It's not really all that difficult. When you bisect a network, such as a data center, the bisection bandwidth is the bandwidth usable to get from one side of the bisection to the other, possibly ...
Ron Maupin's user avatar
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5 votes
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What's the term for throughput including all Ethernet overhead?

I simply call this link speed or L1 throughput; with Ethernet, this is the nominal speed. You can directly calculate the maximum, effective L4 throughput for TCP over IPv4 over standard Ethernet (...
Zac67's user avatar
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5 votes

Correct term for networks created for virtual machines and containers?

Under the hood, all virtualization systems, including docker, use the same mechanism: they use a software switch on the host. Such a switch can be called a "virtual switch" (but this is a bit grey ...
JFL's user avatar
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5 votes
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Can TCP stand for "Transport Control Protocol"

The guys who defined it called it Transmission Control Protocol only. The others seem to have it mixed up.
Zac67's user avatar
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4 votes

Signaling vs encoding

Think of Morse Code. The signal is the sound, pulse, or light. The message is encoded using the "dits" and "dahs", for example.
Ronnie Royston's user avatar
4 votes
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What does "end site" mean?

In the context of RFC 6177, "IPv6 Address Assignment to End Sites", an end site would be a single location with its own dedicated IP service provision. That definition might encompass ...
Alnitak's user avatar
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4 votes

Can a network bridge be viewed as a two port switch?

In most respects, yes. A bridge may be just a switch, but it may also be more: there are (were) bridges that could connect different MAC-oriented layer 2 protocols like Ethernet, Wi-Fi, Token Ring, ...
Zac67's user avatar
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4 votes
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What is difference between "topology of network" and "geometry of network"?

Converted from comment Most of the time, "network geometry" doesn't make too much sense. You build networks as a bus, in stars, trees, rings but these are topologies. Above the actual topology you ...
Zac67's user avatar
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4 votes

Can TCP stand for "Transport Control Protocol"

"Transport" in place of "Transmission" just looks like a mistake. However, in some early documents "TCP" is used to mean "Transmission Control Program" not &...
jonathanjo's user avatar
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4 votes
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How is the term "fabric" defined in networking?

As infra has laid out so picturesquely, a fabric is a network where everything is interconnected. There is no rigid, official definition, but very often when talking about a fabric it is implied that ...
Zac67's user avatar
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4 votes
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What does 'CPE' stand for, and what is it?

CPE usually stands for customer premises equipment - a router or modem that is supplied by a provider. The opposite is central office equipment COE. A CPE ID is used to uniquely identify a customer-...
Zac67's user avatar
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3 votes
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What's meant by AUI & MAU in ethernet networking?

While these terms are still used sometimes, the actual interfaces are long obsolete. AUI is the 10 Mbit/s interface between the MAC (within the NIC) and the external transceiver PHY for e.g. 10BASE5 ...
Zac67's user avatar
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3 votes

What is the difference between a PHY chip in a switch and a switch controller ASIC in the switch?

As its name implies the PHY chip is responsible for getting an actual fully formed Ethernet (or other transport) frame on to / off of the wire. This will tend to include clocking, carrier, ...
rnxrx's user avatar
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3 votes

What is the meaning of the word 'band' in the following terms: broadband, baseband and bandwidth?

"Band" applies to the range of electromagnetic spectrum used for the transmission. Broadband uses a broad range (as opposed to narrowband), baseband is a band starting at zero frequency (or close to)....
Zac67's user avatar
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3 votes

Why in STP is the switch that is the "center" of the network is called the "Root Bridge," not "Root Switch"?

Spanning Tree Protocol was developed for bridges. Switches are bridges. The original bridges only had a very few interfaces, and bridging was handled in software. When bridges became high-density ...
Ron Maupin's user avatar
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3 votes

what is the industry standard meaning of "flat network"

There is no official definition, and it means different things to different people. In general, the term, "flat network," means that the network isn't hierarchical (network engineer definition), or it ...
Ron Maupin's user avatar
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3 votes

What is the meaning / origin of the terms north-south and east-west traffic?

North South traffic is usually considered from end users to the internet, where traditionally organizations used to have fat links to end user and thin links to the external connectivity. In the ...
Manish Khanijo's user avatar
3 votes
Accepted

What is a "circuit"

Without a more exact context, pretty much any link or connection is a "circuit". Usually, it's more on the logical side rather than each physical link.
Zac67's user avatar
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3 votes

Correct term for networks created for virtual machines and containers?

There is no specific term (that I'm aware of). A "virtual network," "virtual segment," or perhaps "layer 2 domain" all might be acceptable. You can also look at Docker or Kubernetes documentation to ...
Ron Trunk's user avatar
  • 67.7k
3 votes

How is the term "fabric" defined in networking?

I think you have an Idea about Fabric. It means clothes. Now just think how cloth is made with yarn. Everything is inter-connected. See this Image. You will get the idea. Network Fabric is also ...
infra's user avatar
  • 3,138
3 votes

Terminology: Disentangling the word 'Ethernet'

Practically, all of the above. Ethernet is a family of protocols. All of them use a common definition for the data link layer (OSI L2), with some variations. The numerous physical-layer variants (OSI ...
Zac67's user avatar
  • 85.5k
3 votes
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Terminology: Disentangling the word 'Ethernet'

That is when someone says: "The data is transferred over Ethernet" They are saying: "The data is transferred over a LAN/MAN with Ethernet/Twisted Pair cabling using the Ethernet ...
Etienne-Victor Depasquale's user avatar

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