End of Row (EoR) is a networking concept used in data centers. Alternatively, there is Middle of Row (MoR) and Top of Rack
are used to go to each individual server in the racks. The EoR switch is located at the end of a row of racks. Each row of racks usually has its own EoR switch. In contrast, withthe ToR concept each rack has its own ToR
switch. The EoR switches are flexibly configurable and can be extended by a plug-in card if required. The number of ports is lower with this concept than with the ToR concept.