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For questions that are primarily about words / abbreviations specific to networking or network engineering. Do not use this tag as a catch-all for other questions.

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2answers
87 views

Networking: what is the difference between access network and core network [closed]

What is the difference between access network, transport network and core network? What is an access network aggregation network and what is a core network l?
2
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2answers
37 views

Why is ARQ (Automatic Repeat reQuest) named so?

I can't make sense of a naming for Automatic Repeat reQuest. The idea is that ARQ is a method for transmitting data without negative ACKs, so standard ARQ flow is: Sender sends a packet If sender ...
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2answers
95 views

What does minimizing maximum link utilization mean?

I was reading a networking material and it mentions that for optimizing a network, for congestion control and QoS, we need to minimizing maximum link utilization. I don't understand what does this ...
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2answers
39 views

Why don't we calculate time for a packet to get OUT of the wire?

When calculating the end-to-end delay, Transmission Delay is the time need to pump / put the bits onto the wire. Why isn't it the case that end-to-end delay also include the time need to get the bits ...
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1answer
87 views

What's meant by AUI & MAU in ethernet networking?

The questions is so clear, what's meant by AUI (Attachment unit interface ) & MAU (Medium attachment unit) in the scope of Ethernet ? Background : I've recently started to work as software ...
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1answer
25 views

Terminology of addresses [closed]

I was curious about the views of the many very experienced network people here on the use of "IP" for "IP address". Obviously it follows the very common English mechanism where adjective-noun is ...
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1answer
30 views

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

I am interested in the terminology of the following words: baseband, broadband and bandwidth applied in tellecomunications. What is the meaning of the words, how were they formed and what do they mean ...
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1answer
33 views

In the MAC acronym what do the words Media, Access and Control refer to independently?

I am not a native English speaker and I know what MAC addresses are and how are they used in networks. However what I do not understand is where this words came from independently. What does Media ...
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2answers
610 views

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?

I understand the number in the naming convention. The number represents how many Megabits per second can the standard support. However, I do not understand the rest of the naming convention. What do "...
4
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1answer
131 views

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

I never worked with bridges because they were no longer used when I first got internet at home, and I have some troubles understanding what exactly was the role of the switches. From my search I ...
1
vote
1answer
59 views

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

I am interested in the terminology of the term "root bridge." Why was this word chosen instead of the word switch, which would have been more intuitive?
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2answers
239 views

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

I am analyzing the block diagram of a switch and I would like to know more about the difference between PHY chip and ASIC (which I think is also called Switch controller). What is the JOB of each ...
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1answer
52 views

What does the adjective 'logical' mean in logical- addressing, connection, topology etc?

I get somewhat confused when I come across the adjective 'logical'. Some contexts I come across them: logical addressing, logical connection, logical topology, logical network etc. Is it just as ...
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1answer
204 views

Reverse Received Signal Strength Indicator (RSSI)

I am wondering what the Reverse Received Signal Strength Indicator (RSSI) is. I came across the term in the BEEKS Beacon's datasheet, under the heading "Bluvision BLE Stack Specification".
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3answers
3k views

What's the difference between Frame, Packet and Payload?

So what exactly is the difference between Frame, Packet and Payload? I've seen people use these terms interchangeably but what is the actual difference?
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0answers
20 views

Q-in-Q upstream port

Please advise me on technical jargon. What is the proper term for a port that adds an S-tag? How do you call a port adds the outer tag?
1
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1answer
690 views

Terminology - What pod means?

I read some papers with the term pod. Specially "pod switches". What pod means? This is an acronym? To what?
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4answers
106 views

What is the security purpose of a bridge?

Linux bridges operate at layer 2 and therefore can only switch packets between interfaces whose mac addresses are contained in a single bridge; a full router operates at layer 3, and thus allows ...
0
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1answer
765 views

what is the industry standard meaning of “flat network”

I have typically known 'flat network' to be a non-vlan network, typically a single /24. We have a new hire (security analyst) at my company and he asked the desktop support supervisor if he had "...
1
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1answer
777 views

Significance of Bisection Bandwidth, Full Bisection Bandwidth, Subscription and their differences

I am confused by the terms Bisection Bandwidth, Full Bisection Bandwidth, and (Over/Under)-subscription. How do they all relate to one another in Data centres and in the general sense? I believe ...
3
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2answers
214 views

What do I call the first IP of the block?

TL;DR Given 8.8.8.8, what do I call its 8.8.8.0 or 8.8.8.1? Why do I need this information? I'm working on a program that resolves the location of IP addresses. To reduce the number of API requests ...
9
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2answers
344 views

What is the proper name for hexadecimal like standard notation of an IPv6 address?

RFCs such as 5952 - "A Recommendation for IPv6 Address Text Representation" and 2373 - "IP Version 6 Addressing Architecture" each outline the commonly used hexadecimal and colon based notation that ...
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3answers
9k views

Is host name and server name the same thing?

I have seen the use of both terms. Are they the same thing or are there any differences between them? I have seen the use of "server name" on this Wikipedia page and on this Yahoo Answers page.
2
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1answer
36 views

Are the channels mentioned here physical or logical in duplex and multiplex?

https://en.wikipedia.org/wiki/Duplex_(telecommunications) In a half-duplex system, there are still two clearly defined paths/channels, and each party can communicate with the other but not ...
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3answers
102 views

Does connectionless mean the same as multiplexing?

The concepts of connection-oriented and connectionless and the concept of multiplexing come to me in different chapters in Tanebaum's Computer Networks. But after some thoughts, I feel that ...
2
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2answers
174 views

What are endpoints in the data link layer, physical layer and application layer called?

From Tanebaum's Computer Network: When an application (e.g., a user) process wishes to set up a connection to a remote application process, it must specify which one to connect to. (Con- ...
3
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1answer
89 views

Is datacenter a lan?

A datacenter can contains thousands of machines. At very high level is it just a LAN and private network with thousands of machines on them. Is datacenter a LAN ? or is it WAN ? Is datacenter a ...
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1answer
51 views

Exclusive responsibility of a DCE

I've read a lot of definitions of DCE and DTE and I'd want to know if data transmission if exclusive responsibility of a DCE.
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2answers
3k views

Network Daughter Card vs Network Interface Card

I've noticed that when customizing a server for Dell you have the option to select between "Network Daughter Cards" and "Network Interface Cards", as well as a number of others. I've looked up the ...
0
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1answer
52 views

Terminology: what is the scope of the meaning of the word 'telecommunications'?

Does 'telecommunications' refer to only some kinds of networks in modern usage? I know that literally it means 'distance (tele-) communication', but does it refer only to TV or cell phones or internet ...
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1answer
62 views

IP spoofing not used for attacking - wording?

I would like to express that I do IP spoofing, but do not use it for an attack. Since IP spoofing seems to be always used in combination with performing an attack, I wonder if there is a word with the ...
17
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4answers
20k views

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

In context of networking I keep running into statements such as "east-west traffic is larger than north-south traffic". I have tried a bit of googling but have not been able to locate an authoritative ...
5
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4answers
2k views

Signaling vs encoding

Here are Cisco's definitions. Signaling The physical layer must generate the electrical, optical, or wireless signals that represent the "1" and "0" on the media. The method of representing ...
2
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2answers
146 views

Terminology on data link, channel, VLAN

I am new to networking and I'm following a CCNA course. There are a few terms that I don't (properly) understand, and I've searched for them like a mad man, but with no success. I've only read 2 ...
2
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1answer
331 views

Difference between RWND and RWIN?

I stumble upon both abbreviations in the same context and it seems they are used interchangeably. But I'd like clarification if this is actually the case or if there are differences between the two. ...
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2answers
9k views

What is nodal delay?

I keep seeing the definition of nodal processing delay as "The time it takes to process a packet in a network node (router, switch, hub, etc.), which is dependent on the speed of the device and ...
5
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3answers
363 views

Why use 'switching' term for packet switching

On a packet switching network, a router is required to route packets to different networks. Why does packet switching uses the term 'switching' when a packet is a term for a layer 3 PDU and ...
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5answers
81k views

What's the difference between an Ethernet cable and a UTP cable?

Is there such a thing as an Ethernet cable or technically no? Are they actually called UTP cables? From wikipedia UTP cables are found in many Ethernet networks and telephone systems.
4
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2answers
4k views

What is the difference between data rate and latency?

Both attempt to measure the speed of a network. If data rate is the thing that is commonly measure in Mbps and latency is the thing that is measured in milliseconds, what are their similarities and ...
4
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3answers
588 views

In networking, is there a word for the first n bytes of an IP address?

I have two IP addresses. They share an IP address to the nth byte. Is there a word that effectively says that they have the same IP address up to the nth byte? Are there different words depending on ...
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2answers
168 views

Why is the telephone network isochronous?

The definition page on Wiktionary for "Isochronous" offers this example of the word in a sentence: Their entire national telephone network is isochronous, with a clock distribution tree radiating ...
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1answer
147 views

Mysterious “X” in network terminology

Many times I've come across that there is an "X" added to the end of network-related names on equipment, like how copper cables have wires in them called TX and RX, and ports on switches can have ...
9
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1answer
8k views

What is “1 Erlang” for network data traffic?

I understand (or at least I believe I do) the concept of Erlang load unit when it is applied to voice communications. Voice communications occur in real-time and measured against real-time, so ...
7
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2answers
244 views

What determines the degree of parallelism that can occur over a network?

I'm trying to learn more about how a network (both LAN and Internet) handles traffic, and one part of this is the question of parallelism. In the documentation for Speedtest.net, in describing how ...
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1answer
143 views

DSL-RAM - Bandwidth Problems

I have an ADSL2+ (Annex B) line, which uses Rate-Adaptive-Mode. It synced fine with 6000/600 kBit/s down/up for 2 years, which resulted in around 6/0.6 MBit download/upload-speed in my LAN. Now, since ...
21
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1answer
9k views

Route servers and looking glasses - what are they?

I've heard the term "route server" and "looking glass" thrown around here. What are they, and why should I care?
5
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5answers
7k views

What are leased lines, serial lines and dedicated lines?

I hear the terms leased line and dedicated line and want to know what the difference is. For example, is DSL considered a lease line? or is T1 considered a lease line? I hear all these terms being ...