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CNIT 344 Final Exam 1 and 2 Solved 2024
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CNIT 344 Final Exam 1 and 2 Solved 2024
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CNIT 344 Final Exam 1 and 2 Solved 20243 approaches of IP subnetting - ANSWER-Classes: 2layer hierarchy
Fixed-length subnetwork mask: 3 layer hierarchy
Non-fixed-length subnetwork mask: n layer hierarchy
VLSM
CIDR
ACK - ANSWER-acknowledge number valid falg
Address Resolution Protocol (ARP) - ANSWER-Map a IP add to a MAC address
All People Seem To Need Data Processing - ANSWER-Application, Presentation,
Session, Transport, Network, Data Link, Physical
APIPA (Automatic Private IP Addressing) - ANSWER-If a DHCP client is unable to
locate a DHCP server and is not configured with an alternate configuration, it will default
to 169.254.0.0/16
The client then test to verify if the IP it has chosen is no used by using ARP broadcast
If chosen IP is in use, the computer will randomly selects another address
BOOTP - ANSWER-Server: UDP 67
Client: UDP 68
Work at boot time
IP doesn't renew until system reboot.
assign default gateway, subnetmask
Class A start with? and it has a range of ? - ANSWER-0
0.0.0.0/8 - 127.0.0.0/8
Class B start with? and it has a range of ? - ANSWER-10
128.0.0.0/16 - 191.255.0.0/16
Class C start with? and it has a range of ? - ANSWER-110
192.0.0.0/24 - 223.255.255.0/24
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
Data-liink layer - ANSWER-Provide point to point validity of the data
Point-to-point checking and correction (CRC)
Use Frame
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.
Describe the routing process - ANSWER-Gateway is accessed by client's frame
Src Mac is client while Dest Mac is Gateway
Gateway checks if Dest Mac is that of Gateway
Gateway find IP in the frame
Gateway makes decision based on Dest IP, routing protocol.
If entry is found, reconstruct L2 frame and forward
If no entry is found, packet will be dropped.
NOTE: Src MAC is outgoing int of router
Dest MAC is MAC of next hop
DHCP relay agent - ANSWER-DHCP relay agent is either a host or an IP router that
listens for DHCP client message on the subnet and broadcast those message to DHCP
server
The DHCP server sends DHCP response messages back to the relay agent, which then
broadcast them onto the subnet for the DHCP client.
Using DHCP relay agent eliminates the need for separate DHCP server on each subnet
DHCP reservation - ANSWER-Net admin can use DHCP reservation for DHCP client
with need on static address
Reservation must be in the scope
The reservation is tied to MAC address
DHCP scopes - ANSWER-The ip address in DHCP scope need be to contiguous
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