In this configuration, the wireless interface (wlan1) on the AP is in ap-bridge mode, and on the CPE it's in station-bridge mode. This mode allows full Layer 2 bridging over wireless, supporting all Ethernet-based protocols and services, including:
* IPv4, IPv6, DHCP, ARP, PPPoE, and routing protocols like BGP (which use TCP/IP).
Protocols like USB or Firewire are hardware-level or local bus protocols and cannot be transmitted over Ethernet frames or wireless.
Option Review:
* A.#IPv4 - supported
* B.#ARP - Layer 2 protocol, supported
* C.#USB - not a network protocol, not transmitted over bridges
* D.#BGP - Layer 3 protocol, supported over bridged links
* E.#Firewire - not a Layer 2 or network protocol
* F.#IPv6 - fully supported
* G.#DHCP - Layer 3 broadcast protocol, works over bridges
* H.#PPPoE - Ethernet-based protocol, passes over Layer 2 bridge
Extract from Official MTCNA Course Material - Wireless Bridging:
"station-bridge mode allows transparent Layer 2 bridging, supporting all Ethernet protocols including IPv4, IPv6, ARP, DHCP, PPPoE, and more." Extract from Rene Meneses MTCNA Study Guide - Wireless Modes:
"Use station-bridge with ap-bridge to pass full Layer 2 traffic. This allows DHCP, PPPoE, and other protocols to work transparently." Extract from MikroTik Wiki - Station Bridge:
"station-bridge mode is used with MikroTik-only links and allows full Layer 2 protocol support, including dynamic IP assignments and bridging."