Netstat will show open connections by IP and port. Nslookup will resolve domains to IP addresses (DNS). Ipconfig /all will show you the default gateway and your MAC addresses but not the MAC of another network device. arp -a will show the Address Resolution Protocol (ARP) table, which will include the ARP for your default gateway.
The Address Resolution Protocol (ARP) is a telecommunication protocol used for resolution of Internet layer addresses into link layer addresses, a critical function in computer networks. ARP was defined by RFC 826 in 1982, is Internet Standard STD 37, and is also the name of the program for manipulating these addresses in most operating systems.
ARP is used for mapping a network address (e.g. an IPv4 address) to a physical address like an Ethernet address (also named …