A Good "Deal"! In modern systems $($TCP$/$IP running over Ethernet and WiFi$),$ just $3$ pairs of numbers can guide our packets across the world: they make fast local$-$delivery switched networks, and globally$-$scalable routed networks, possible. Imagine a client $($source$)$ is requesting an loT$-$related service from a server $($destination$),$ so the communication is starting from the client. Please match the relevant number with its description.

Source MAC address $($SMAC$)$

Destination MAC address $($DMAC$)$

Source IPv$4$ or IPv$6$ address

Destination IPv$4$ or IPv$6$ address

Source TCP or UDP port number

Destination TCP or UDP port number

$[$Choose$]$

$[$Choose $]$

a well$-$known label for a service being requested

the Layer $3,$ network layer address of the intended recipient of the packet

the Layer $3,$ network layer address of the originator of the packet

the LAN hardware address of the originator of a frame

the LAN hardware address of an intended local end recipient of the frame, or the local default gateway a locally$-$significant way of numbering a specific service "conversation"