can you help me with these questions?

46 Which of the following statements describes the OSI reference model?

It details a set of rules describing the design process of a network.
It provides a standard for measuring network performance.
It divides the process of network communications into seven layers.
It describes the set of procedures for troubleshooting network problems.

47 Which UNIX command allows viewing and changing items in the configuration of a network interface such as IP address, hardware address, broadcast address, and subnet mask?

netconfig
ifconfig
pathping
lsof

48 Which TCP/IP utility prints information about network connections, routing tables, and interfaces?

arp
netstat
host
dig

49 How is the FTP Service installed on Windows 2000?

by installing with a separate program
by starting Windows 2000 services
by opening the Web Services site
by installing the IIS component of Windows 2000

50 What is the most popular Web server software for Linux?

Apache
Roxen
Opera
thttp

51 What are three key concepts when analyzing and optimizing network performance?

bottlenecks, baselines, and best practices
baselines, base logs, and best practices
best practices, base logs, and bottlenecks
baseline, bottlenecks, and backups

52 What is the most common media used in Ethernet 10BaseT implementations?

STP
UTP
coaxial
ThinNet