What are the data link layer issues that can cause problems?

[mad_mavula]

Can someone explain me what are the layer 2 issues that can cause problems in a small-office home-office (SOHO) network. It will be really helpful if you can put references too.

[marce1000]

 - You have been asking a series of questions including this one , which relate to networking knowledge. This place deals with practical and or 'live' ongoing technical problems for users. Have a glance at https://learningnetwork.cisco.com/

                          for instance.

 M.

[mad_mavula]

Thank you for recommending me another community to get knowledge which is very helpful. But I have gained much knowledge from this community from their questions because when I search something on google this site comes if a same kind of question has been asked no matter whether it is related to technical problem or knowledge related. So it is better if you could answer the question as well then if someone else has the same question they can get the answer which is very helpful to them as well.

[paul driver]

Hello

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@mad_mavula wrote:

Can someone explain me what are the layer 2 issues that can cause problems in a small-office home-office (SOHO) network. It will be really helpful if you can put references too.

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You could experience different issues regarding your L2, stp loops, unidirectional link errors, broadcast/unicast/multicast (BUM) storms But significantly security breaches hence the reason why there are specific L2 security features and best practices that can be implemented

https://www.ciscolive.com/c/dam/r/ciscolive/apjc/docs/2018/pdf/BRKCRS-2661.pdf
https://www.cisco.com/c/dam/global/da_dk/assets/docs/security2006/Security2006_Eric_Vyncke_2.pdf
https://www.cisco.com/c/dam/global/fr_ca/training-events/pdfs/L2-security-Bootcamp-final.pdf

[mad_mavula]

Can you please put some references to STP loops, Cause I couldn't find any proper information on that. Because as per my knowledge STP is there to prevent loops, so it is bit confusion for me on how STP loops do happen.