Questions tagged [duplex]

For questions about duplex on an interface spanning all on topic network devices. For instance, you are troubleshooting an issue where two devices will not negotiate the correct duplex.

Filter by
Sorted by
Tagged with
0
votes
0answers
12 views

Is pair cable always full duplex? Can it be half duplex at double the bitrate? [duplicate]

This is probably a newb question, forgive me. For pair cable, there are two signals that can be sent: following that logic, it seems like you could have two situations: full duplex at bit rate X in ...
4
votes
1answer
156 views

Confused about single strand Fiber media converter or duplex media converter?

As per Title you may understand my question. I have read many articles about WDM technology as well as Tx/Rx on separate optical fiber. Here my question is which is better in real environment? Any ...
0
votes
1answer
18 views

Does Time division duplexing work this way?

During the course of research, I have found a really hard time understanding this short lines below. I will appreciate a short hint or explanation from any expert in this area.
2
votes
3answers
219 views

How can 1000BaseT transmit on Rx & receive on Tx pins?

How can 1000-BaseT (Gigabit ethernet twisted copper pairs) technology transmit over the Rx pins & receive over the Tx pins? It's baseband technology (hence the name), right? Discrete digital ...
1
vote
2answers
707 views

Can a half duplex communicate with a full duplex device

If I have a full duplex relay, can half-duplex devices effectively communicate with this relay? Also, can interference cancellation be applied to the relays or devices in this case? To be more ...
7
votes
7answers
3k views

How LAN works in video games if only one station is permitted to transmit?

I've read the in a LAN the data is transmitted in packets so as to allow only one station to transmit at a given time, so how could this be applied in video games LAN parties if only one device is ...
1
vote
4answers
140 views

Can we use two pairs of UTP with hubs?

I understand that hub always supports for half-duplex communication. In that case we should use one out of four UTP pairs. However, I read that for 10BaseT ethernet two pairs of UTP cables are used ...
4
votes
2answers
61 views

Better throughput with 100 Mb NIC setting

Ran across something very odd today. Just had a symmetrical 100 Mb circuit installed at a site I’m contracting at. When the NIC is set for auto negotiate for duplex and speed, we only get ~96 Mb down ...
4
votes
3answers
170 views

The recommended settings for giga ethernet connected to Ethernet port

What is the recommended duplex and speed configuration for giga ethernet port connected to legacy ethernet (10 mbps) port and there is no available duplex command available on the ethernet side? If ...
1
vote
1answer
71 views

Is it possible.. Partial Duplex: 100mb one way & 1000mb the other

I have a potential application where the vast majority of the traffic will be in one direction, and, concurrently, I have a potential alternate use for a pair of wires in the cable that would ...
1
vote
1answer
416 views

Full Duplex and Half Duplex Channel Capacity

As far as I know about full and half duplex, if we have a channel with bandwidth 10Mbps then in full duplex both sender and receiver can transfer 10Mb in both directions at the same time and in half ...
3
votes
3answers
632 views

Full duplex vs. half duplex

My main question is why are hubs always half duplex and layer 2 switches can be full duplex? Because let's say I have a ethernet cable that has pins that can send and receive data at the same time, ...
5
votes
2answers
2k views

Full Duplex and Collision Domain

I have a very basic query on Collision Domain and Full Duplex Mode. There are two types of logical topology: Ethernet and Token Ring . Whenever we read about Ethernet the first thing that we are ...
7
votes
6answers
14k views

Can a single optical fiber support full-duplex communication?

Can a single-mode single optical fiber support full-duplex communication, or does it have to be two fibers, one for each direction?
-1
votes
3answers
10k views

Difference between Half duplex and Full duplex

What is the difference between Half duplex and Full duplex in Transmission mode?
3
votes
1answer
161 views

AFDX (Avionics Full-Duplex Switched Ethernet) Mapping

I'm currently learning about AFDX networks and one of the main questions I have is the ability to do a mapping and port scanning of them. My understanding is that it is based on UDP connection using ...
1
vote
2answers
106 views

Is it possible to implement full-duplex upper layers over simplex or half-duplex lower layers?

For example, TCP is full duplex. Can it be built on top of non-full-duplex underlying communications?
1
vote
2answers
642 views

Multiple access and full/half duplex point-to-point links

In en.wikipedia.org/wiki/Channel_access_method, A channel-access scheme is based on a multiplexing method, that allows several data streams or signals to share the same communication channel or ...
2
votes
1answer
50 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 ...
4
votes
1answer
94 views

Auto Sensing in Modern Switching Equipment

Ive noticed that Modern switching equipment will auto sense whether it should be DTE or DCE. It will also auto sense whether the line can be in full duplex mode, or if it must be in half duplex. Ive ...
2
votes
1answer
138 views

Network load and capacity design - Full Duplex Media?

When calculating the load for a network, Data leaving the pc is always going to be less than the data from the internet and servers. So is it safe to assume that if you work out the load with data ...
1
vote
2answers
10k views

Negotiation speed/duplex between a Gigabit ethernet switch or hub and NIC [duplicate]

Please help me on this case: When I connect a NIC manually set to 100 Mbps and Full Duplex to a Gigabit Ethernet port (set to Auto/Auto), what will the result be? Will the Gigabit Ethernet port ...
4
votes
4answers
8k views

How is TCP duplex if Ethernet is half-duplex?

If I understand correctly, TCP is a full-duplex birectional protocol. However, Ethernet is half-duplex. Does this mean that eventhough TCP supports full-duplex, it only operates in half-duplex mode ...
11
votes
2answers
13k views

Technical difference between a Collision and Broadcast Domain

Many people new to networking wonder what the technical differences between a broadcast domain and a collision domain are. Specifically: What criteria is used to know the boundaries of a collision ...
3
votes
2answers
1k views

Full-duplex collisions in wires

I don't know that much in detail how full-duplex works and I wonder if collisions can occur in them. Take a UTP cable for an example - are some cables within it reserved for data going one way and the ...
2
votes
1answer
4k views

Full-Duplex and Speed negotiation

I have a server where speed and duplex are set to auto. The NIC supports 1000mb/s, and is connected to my Cisco switch. When I check on port I see that the speed is set to 100Mb/s and Full Duplex. ...
19
votes
2answers
23k views

Ethernet autonegotiation differences between (10M | 100M | 1G) Ethernet

I am studying for CCNA and on Wendell Odom's book is said that(regarding autonegotiation): When autonegotiation fails on one node, to choose (half/full-duplex) we must use the rule: If you have a 10/...
7
votes
4answers
2k views

discover duplex mismatch interfaces in the network

What are the causes of duplex mismatch other than misconfiguration? (power outage? improper cabling? auto negotiation implementation bugs?) Any thoughts on discovering duplex mismatch? NetMRI seems ...