Update physical-network-requirements.md

Author: Daidihuang

azure-stack/hci/concepts/physical-network-requirements.md

@@ -135,7 +135,7 @@ If your switch isn't included, contact your switch vendor to ensure that your sw
 
 |Model |Firmware| Management | Storage | Compute (Standard)| Compute (SDN)|
 |-----  |---| :-:  | :-:  | :-:   | :-:   |
-| [S41xx series](https://www.dell.com/learn/us/en/45/shared-content~data-sheets~en/documents~dell-emc-networking-s4100-series-spec-sheet.pdf) <br>(10 GbE)|SmartFabric OS10.5.4 or later |&check;| &check;| &check;| &check; |
+| [S41xx series]([https://www.dell.com/learn/us/en/45/shared-content~data-sheets~en/documents~dell-emc-networking-s4100-series-spec-sheet.pdf](https://www.dell.com/en-us/learn/assets/shared-content~data-sheets~en/documents~dell-emc-networking-s4100-series-spec-sheet.pdf)) <br>(10 GbE)|SmartFabric OS10.5.4 or later |&check;| &check;| &check;| &check; |
 | [S52xx series](https://www.delltechnologies.com/resources/en-us/asset/data-sheets/products/networking/dell_emc_networking-s5200_on_spec_sheet.pdf) <br>(10, 25, 100 GbE)|SmartFabric OS10.5.4 or later |&check;| &check;| &check;| &check; |
 | [S54xx series](https://www.delltechnologies.com/asset/en-us/products/networking/technical-support/dell-emc-powerswitch-s5448f-on-spec-sheet.pdf) <br>(25, 100 GbE)|SmartFabric OS10.5.4 or later |&check;| &check;| &check;| &check; |