Which of the following are characteristics of OS Partitioning Style of Virtualization Multiple O/S guests per nost Same O/S Guests Streamlined Hardware Invocation Modified Guest Kernel Emulated Hardware Invocation Potential Licensing Savings on Guests Which networking device extends an internal network beyond the security perimeter Firewall Proxy VPN Switch Router Asynchronous communication is A reliable form of communication Time-Uncoupled A direct form of communcation Space coupled Which object oriented principles are distributed objects built on encapsulation constraint data abstraction regular expression object classification Which of the following protocols assists in the routing of messages in a packet-switched network? NAT RIP TCPIP VLAN ARP