tcp packet walks in to a bar and says "I want a beer", barman says "you want a beer?" and tcp packet says "yes, a beer"

An RTP packet walks into a bar through the wrong entrance.  The barman says "You're not getting any special treatment"

A multicast packet walks into a bar and leaves by four different exits.

A BGP Update walks into a CRS-1.  He walks back out with a corrupt optional transitive attribute.

A DNS packet walks into a liquor store - where do I find beer "ABC"?. Clerk: aisle 4, top row on the right.

An IPv6 packet walks into a bar. Nobody talks to him.

A UDP packet went into a bar. The bartender didn't acknowledge him...

ICMP packet walks into a bar from warehouse and announces - "no more beer"

A dhcp packet walks into a bar and asks for a beer. Bartender says , "here, but I'll need that back in an hour!"