What does $0/0$ indicate for Interface FastEthernet $0/0?$

$2.$ How many usable host IP addresses are available given the following IP address and subnet mask:

ip address $10\mathrm{.}10\mathrm{.}20\mathrm{.}1255\mathrm{.}255\mathrm{.}255\mathrm{.}224?$

$3.$ How many usable host IP addresses are available given the following IP address and subnet mask:

ip address $172\mathrm{.}25\mathrm{.}80\mathrm{.}0255\mathrm{.}255\mathrm{.}255\mathrm{.}240?$

$4.$ How many usable host IP addresses are available given the following IP address and subnet mask:

ip address $192\mathrm{.}168\mathrm{.}12\mathrm{.}0255\mathrm{.}255\mathrm{.}255\mathrm{.}252?$

$5.$ What is the purpose of the shutdown command when it is applied to an interface?

$6.$ Given router ospf $100,$ what is the purpose of this command, and what does the $100$ represent?

$7.$ What is the purpose of the ip http server command and from what prompt is this command

issued?

$8.$ What router command is used to determine if your serial interface is DTE or DCE?

$9.$ What command is used to display the routing protocols configured on your router?

$10.$ What is the purpose of the following command? line vty $04$

Computer$/$Interface $$ R$1$ IP Address Subnet Mask Gateway Address

PC$1192\mathrm{.}168\mathrm{.}125\mathrm{.}66255\mathrm{.}255\mathrm{.}255\mathrm{.}240192\mathrm{.}168\mathrm{.}125\mathrm{.}73$

R$1-$FA$0/0192\mathrm{.}168\mathrm{.}125\mathrm{.}73255\mathrm{.}255\mathrm{.}255\mathrm{.}240$

R$1-$S$0/0/0192\mathrm{.}168\mathrm{.}25\mathrm{.}29255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

R$1-$S$0/0/1192\mathrm{.}168\mathrm{.}25\mathrm{.}9255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

Computer$/$Interface $$ R$2$ IP Address Subnet Mask Gateway Address

PC$2192\mathrm{.}168\mathrm{.}12\mathrm{.}14255\mathrm{.}255\mathrm{.}255\mathrm{.}240192\mathrm{.}168\mathrm{.}12\mathrm{.}1$

R$2-$FA$0/0192\mathrm{.}168\mathrm{.}12\mathrm{.}1255\mathrm{.}255\mathrm{.}255\mathrm{.}240$

R$2-$S$0/0/0192\mathrm{.}168\mathrm{.}25\mathrm{.}6255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

R$2-$S$0/0/1192\mathrm{.}168\mathrm{.}25\mathrm{.}30255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

Computer$/$Interface $$ R $3$ IP Address Subnet Mask Gateway Address

PC$3192\mathrm{.}168\mathrm{.}195\mathrm{.}14255\mathrm{.}255\mathrm{.}255\mathrm{.}240192\mathrm{.}168\mathrm{.}195\mathrm{.}1$

R$3-$FA$0/0192\mathrm{.}168\mathrm{.}195\mathrm{.}1255\mathrm{.}255\mathrm{.}255\mathrm{.}240$

R$3-$S$0/0/0192\mathrm{.}168\mathrm{.}25\mathrm{.}10255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

R$3-$S$0/0/1192\mathrm{.}168\mathrm{.}25\mathrm{.}5255\mathrm{.}255\mathrm{.}255\mathrm{.}252$