OSI Model
What is the mnemonic for the OSI Model
Please Do Not Throw Sausage Pizza Away (Physical, Data Link, Network, Transport, Presentation, Application)
An IPv4 address consists of this many bits
This protocol is used to map IP addresses to their corresponding MAC addresses on a local network.
ARP (Address Resolution Protocol)
The type of query that responds to client requests by querying other DNS servers if it does not have the answer.
Recursive query
This router connects a local network to other networks, typically the internet, and is used to forward traffic from a local network to destinations outside that network
Default gateway router
The only layer users interact with directly, this OSI layer handles network services for applications
Application Layer
This address is used to send a packet to all devices on a subnet.
Broadcast address
This table stores mappings of IP addresses to MAC addresses.
ARP cache
This ICMP message type is used to test connectivity between network devices by sending echo requests and expecting echo replies
Echo Request
The collection of IP addresses that can be dynamically assigned to clients by a DHCP server is known as
Pool/Scope
This layer of the OSI Model is responsible for the transmission of raw bit streams over a physical medium.
Physical Layer
This IP header field specifies the maximum number of hops a packet can take before being discarded.
Time to Live (TTL) field
This type of ARP message is sent in response to an ARP request, providing the requested MAC address.
ARP Reply
This field in an ICMP frame indicates the purpose of the message, such as echo request or destination unreachable
Type field
When a device joins a network and requests an IP address from a DHCP server, it is acting as this
DHCP client
Wi-Fi signals and Ethernet cables are examples of technologies operating at this OSI layer.
Physical Layer
This address class is reserved for multicast groups and ranges from 224.0.0.0 to 239.255.255.255.
Class D
This network layer protocol is used for error reporting and diagnostics within an IP network.
ICMP (Internet Control Message Protocol)
A type of resource record in the Domain Name System that maps one domain name to another
CName
IP routing protocol that uses a mathematical algorithm to calculate the most efficient path to direct traffic on IP networks
OSPF
Protocols such as TCP and UDP operate at this OSI layer, ensuring data integrity and proper sequencing
Transport Layer
The unicast address used by the device itself to refer to its own network interface.
The loopback address (127.0.0.1)
This field within the Ethernet frame specifies the type of data contained in the payload.
EtherType field
Command Line utility that displays possible routes and transit delays of packets across an Internet Protocol network
Tracert
The immediate destination to which a packet should be forwarded on its way to the final destination
Next hop