Select two disadvantages of a full-mesh topology.

A full-mesh topology connects every node directly to every other node. This creates a large number of connections, making the configuration complex, especially as the number of nodes increases. Each new node requires a connection to every existing node, leading to a significant increase in configuration tasks. This also drives up implementation costs due to the need for more cabling, more network interfaces on devices, and increased labor for installation and configuration. "It needs a high MTU between sites" is incorrect; MTU is not inherently tied to the topology type. "It works only with BGP between sites" is incorrect; routing protocols like OSPF or EIGRP can also be used. "It must have point-to-point communication" is a characteristic, not a disadvantage.