Which two types of devices are specific to WAN environments and are not found on a LAN? (Choose two.)
- access layer switch
- broadband modem
- core switch
- CSU/DSU
- distribution layer router
Explanation: Broadband modems and CSU/DSUs are examples of WAN devices. Core switches can be found on both WANs and LANs. Access layer switches and distribution layer routers are found only on LANs.
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