Internetworking W1-W2 Flashcards
DHCP
Dynamic Host Configuration Protocol
DNS
Domain Name System
A globally distributed, scalable, reliable database
Domain name: Maximum depth and maximum characters
127 Levels
255 Characters
What is a subdomain? Give Example
sales.nominum.com is a subdomain of nomnum.com & com
Authorative type of name server. Explain
Authorative - maintains the data.
Primary - where the data is edited
Secondary - where data is replicated to
Non-authorative type of name server. Explain
(Caching) – stores data obtained from an authoritative server
Name resolution explain the process
Is the process by which local resolvers and name servers cooperate to find data in the name space. (e.g. nslookup)
Lease
Length of time a DHCP client can use a specific IP address
Cache
is hardware or software that is used to store something, usually data, temporarily in a computing environment.
IP pool
a set of available IP addresses that you can pass on to customers and resellers, or utilize for your own websites
TCP
TCP stands for Transmission Control Protocol a communications standard that enables application programs and computing devices to exchange messages over a network.
Functionalities of Layer 3. Explain
Network Layer
This layer handles the routing of the data by delivering it to the correct destination.
What’s the maximum range of bytes in the IP address? ipv4
0-255
Class A
Give range and characteristics
1-127
Network prefix: 8 bits
Host ID: 24 bits
Used for large number of hosts.
Class B
Give range and characteristics
128-191
Netowrk prefix: 16 bits
Host ID: 16 bits
Used for medium size network.
Class C
Give range and characteristics
192-223
Network prefix: 24 bits
Host ID: 8 bits
Used for local area network.
Class D (mcast)
Give range and characteristics
224-239
Reserve for multi-tasking.
Class E
Give range and characteristics
240-254
Reserved for research and Development Purposes.
Connectionless
The communication between two network endpoints without a prior arrangement in which one network endpoint simply sends a message to the other
Payload
Meaningful valuable data that we want to send to point.
Multicasting
Communication between single sneder and multiple receivers.
Unicasting
a single, direct request sent from one host to another
Broadcasting
Transmitting a packet that will be received by every device on the network
Submasks. Classes A,B,C
A: 255.0.0.0
B: 255.255.0.0
C: 255.255.255.0
Datagram
is a basic transfer unit associated with a packet-switched network. Datagrams are typically structured in header and payload sections.
