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CNIT 344 Exam 2 Verified 100% 2024
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CNIT 344 Exam 2 Verified 100% 2024
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CNIT 344 Exam 2 Verified 100% 20242 Level Hierarchy of IP Addresses - ANSWER-Network & Host (hierarchy means that
routers only need to know the "network" part)
Address Types - ANSWER-MAC: physical address of host that is burned into the NIC
(Layer2)
NET: logical, assigned by the network admin (Layer3)
Can a DHCP client and server be on separate networks? - ANSWER-YES
Can a packet be forwarded without a route? - ANSWER-NO
Can broadcast or unicast messages create ICMP messages? - ANSWER-NO
DNS (domain name system) - ANSWER-The Internet's system for converting alphabetic
names into numeric IP addresses.
DNS message types - ANSWER-Query and Response
DNS structure: - ANSWER-inverted tree
Do Layer 2 switches forward traffic between VLANs? - ANSWER-NO
Each VLAN is a separate _______ domain. - ANSWER-Broadcast
Each VLAN is a separate_____________ - ANSWER-IP Subnet, you need a router to
communicate among these
Error-Reporting Messages - ANSWER-Report problems that a router or a host
(destination) may encounter when it processes an IP packet
Example ICMP commands - ANSWER-ping, traceroute
Host to Router = - ANSWER-Logical to Physical
How does ARP work? - ANSWER-MULTIcast Request looks for physical address of a
node with a specific IP address the client already knows > UNIcast Reply with the
physical node address
How does DHCP work (if Client and Server are on different networks)? - ANSWER-
Client sends a BROADcast request with the client and server port numbers that a relay
agent picks up and forwards as a UNIcast request over the internet to the server
, How does DHCP work (if Client and Server are on the same network)? - ANSWER-
Client sends DHCP request with the Client and Server Port Numbers, Server replies
with Client and Server IP addresses
How does NAT operate? - ANSWER-Operates on a router, usually connecting multiple
networks, and translates the private (not globally unique) addresses in the internal
network into legal addresses, BEFORE packets are forwarded to another network
How is VLAN membership assigned? - ANSWER-By port, MAC address, Network
protocols, IP subnets (L3), higher layer protocols
How many TCP connections does FTP need? - ANSWER-2
IP CLASSES - ANSWER-Class A range: 1-126
subnet mask: 255.0.0.0.
Private: 10.x.x.x
Class B range: 128-191
subnet mask: 255.0.0.0.
Private: 172.16.0.0 - 172.31.255.255
Class C range: 192-223
subnet mask: 255.255.255.0
Private: 192.168.x.x
Loopback is 127.0.0.1
APIPA is 169.254.x.x (also known as link-local)
CIDR: Classless Inter-Domain Routing addresses use a prefix (example:
10.150.23.58/24). The /24 indicates a subnet mask of 255.255.255.0
IP Classes (Simplified) - ANSWER-A.x.x.x
B.B.x.x
C.C.C.x
D.D.D.D
IPv4 Characteristics - ANSWER--unique and universal
-connection-less
-"best effort" delivery (unreliable)
-media independent
Is Layer 3 reliable? - ANSWER-NO
Layer 3 determines_____________________ - ANSWER-routes between source and
destination networks (end-to-end with analysis at each hop)
Layer 3 Provides_________________________ - ANSWER-globally unique addressing
for every node in the network
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