CNIT 315 FINAL PAPER PRACTICE
QUESTIONS WITH VERIFIED ANSWERS
PACKAGE
●● When the lease time start for DHCP
Answer: After the DHCPAck is sent.
●● If you can ping 127.0.0.1 in your computer, what does it mean?
Answer: 127.0.0.1 is the loopback address
TCP/IP is installed properly in your computer
●● Command to bind VLAN to port
Answer: switchport access vlan 1
●● Command to configure trunk port
Answer: switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 1
switchport trunk allowed add vlan 114
●● Inside global address
,Answer: A valid public address that host on the inside network is
assigned as it exits the router
●● Outside Global address
Answer: A reachable IP address assigned to a host on internet.
●● In a home network where it has a pc, a router, and a web server, pc
has an address of 192.168.1.10, which is what address?
Answer: Inside local address
●● In a network where it has a pc, a router, and a web server, a router
has an address of 200.200.200.1. When a PC trying to send a packet to
the internet, it uses router's address, which is what address?
Answer: Inside global address
●● IPv4 Characteristics
Answer: Connectionless: data is transmitted to other hosts without prior
arrangement, UDP is also connectionless.
Best-effort delivery: A network in which the network doesn't provide
any guarantee that the data is delivered or the quality of data.
Media independent: Operates independently of the medium carrying the
data. However, it's concerned with MTU.
, Defined by RFC 791
●● In a home network where it has a pc, a router, and a web server, a
webserver has an address of 100.100.100.1, which is what address
Answer: It's an outside global address.
●● Describe NAT (network address translation)
Answer: When a packet is sent out to from local network, a public
address is assigned to this packet, usually is the address of the router.
●● Describe PAT (Port address translation)
Answer: When two machines in the local network want to access the
services on public network, port will be added to the inside global IP add
to identify machines.
●● Next available port
Answer: What if two local machines use the same port number to access
a web service? Router will use next available function.
if two machines, one with IP 192.168.1.10 and one with 192.168.1.11
both use port 100 to access google. The router will with an add of
200.200.200.1 will likely use 200.200.200.1:100 for .10 machine and
200.200.200.1:101 for .11 machine. During this process, inside local
machine's service port will not be changed.
QUESTIONS WITH VERIFIED ANSWERS
PACKAGE
●● When the lease time start for DHCP
Answer: After the DHCPAck is sent.
●● If you can ping 127.0.0.1 in your computer, what does it mean?
Answer: 127.0.0.1 is the loopback address
TCP/IP is installed properly in your computer
●● Command to bind VLAN to port
Answer: switchport access vlan 1
●● Command to configure trunk port
Answer: switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 1
switchport trunk allowed add vlan 114
●● Inside global address
,Answer: A valid public address that host on the inside network is
assigned as it exits the router
●● Outside Global address
Answer: A reachable IP address assigned to a host on internet.
●● In a home network where it has a pc, a router, and a web server, pc
has an address of 192.168.1.10, which is what address?
Answer: Inside local address
●● In a network where it has a pc, a router, and a web server, a router
has an address of 200.200.200.1. When a PC trying to send a packet to
the internet, it uses router's address, which is what address?
Answer: Inside global address
●● IPv4 Characteristics
Answer: Connectionless: data is transmitted to other hosts without prior
arrangement, UDP is also connectionless.
Best-effort delivery: A network in which the network doesn't provide
any guarantee that the data is delivered or the quality of data.
Media independent: Operates independently of the medium carrying the
data. However, it's concerned with MTU.
, Defined by RFC 791
●● In a home network where it has a pc, a router, and a web server, a
webserver has an address of 100.100.100.1, which is what address
Answer: It's an outside global address.
●● Describe NAT (network address translation)
Answer: When a packet is sent out to from local network, a public
address is assigned to this packet, usually is the address of the router.
●● Describe PAT (Port address translation)
Answer: When two machines in the local network want to access the
services on public network, port will be added to the inside global IP add
to identify machines.
●● Next available port
Answer: What if two local machines use the same port number to access
a web service? Router will use next available function.
if two machines, one with IP 192.168.1.10 and one with 192.168.1.11
both use port 100 to access google. The router will with an add of
200.200.200.1 will likely use 200.200.200.1:100 for .10 machine and
200.200.200.1:101 for .11 machine. During this process, inside local
machine's service port will not be changed.
