Which protocol's header would a layer $4$ device read and process?

IP

TCP

ARP

HTTP

Question $2$

You're getting a duplicate IP address error on your computer and need to figure out what other device on your network is using the IP address $192\mathrm{.}168\mathrm{.}1\mathrm{.}56.$ What command will show you which MAC address is mapped to that IP address?

telnet $192,168,1,56$

tracert $192,168,1,56$

arp$-a$

netstat $-n$

Question $3$

Which remote file access pratocal is an extension of SSHt$?$

SFTP

TFTP $$

FIPS

HITPS