Communication
-can contain ports used as trunks -identified by a VLAN ID between 1 and 1005
VLAN tagging using 802.1Q protocol.
VLANs provide the capability so virtually segregate traffic on a network. VLANs work by tagging traffic packets and ensuring that packets with separate VLAN IDs are only available at ports which have been configured for that VLAN ID.
Youll want to go with striaght-through cable.
The answer is crossover cable
HDLC
The ISL protocol can be used in Cisco routers when configuring the subinterfaces.
100BaseTX implies Cat5 or better RJ45 cables, and between two routers you need a crossover cable.
Routed ports on a multilayer switch function as traditional Layer 3 interfaces, allowing IP routing and enabling communication between different VLANs or subnets. They do not belong to any VLAN and are typically used for connecting to other routers or Layer 3 devices. Routed ports can be configured with an IP address and support routing protocols, making them integral for inter-network communication.
They are used to run the internet.
The adapters are all the same, all configured to work with similar routers. The routers used between the US and EU are not much different so the adapter should work fine.
Modern networks used two devices for the data packets within the network will flow easily. The two devices are the routers and switches.