week7 Flashcards
what is PING
ping is use to test for connectivity.
what is considered a positive ping ?
when the system respond to the ping request.
what is considered a negative ping ?
when the system does not reply to the ping request
reply: request time out or host unreachable
COMMAND
nslookup pc2 (hostname)
nslookup 192.168.2.10
what will be the outcome of these two commands.
nslookup pc2< hostname> (foward name lookup) (A record) will provide a ip address
nslookup (reverse name lookup) ptr record 192.168.2.10 will provide a hostname.
what does ARP stands for ?
address resolution protocol responsible to maps ip address to a MAC addresses
what does MAC stands for ?
(Media Access Control) Address [Physical /Hardware]:
A unique alpha-numeric address assigned to a network device by the vendor.
(can be used to identify a system)
IQ- Display the arp table in a window system.
command arp-a
what is the command to clear your command prompt on your window system
command: cls
what happens the a system every time it communicates to another system?
when a system talks to another system it will save the ip adress and the marc address in the arp table.
what is the tracert command used for?
it is use to display the path of traffic flow of sending system to recieving system across a maximum of 30 routers or hops
quick knowledge
the only time you call a vendor is when. all admin has tried to do everything humanly possible to fix the problem
different type IP
ipv4(4.7 billion), ipv6(340 undecillion),
what’s the difference between ipv4 and ipv6
ipv6 comes with built in security called ipsec while ipv4 comes with no built in security
ipv6 is slower in data transmission than ipv4
what does an octet represents.
it represents a bit
what is an ipv4
An IPv4 is a unique 32 bit number assigned to a networked system by an Admin/DHCP server iot allow the system to communicate in the LAN
what is a ipv6
it is a 128bits alphanumeric address
what is the range number and subnet mask number for class A
first octet 1-126
subnet mask- 255.0.0.0
function-computer
what is the range number and subnet mask number for class b
octet- 128-191
subnet mask- 255.255.0.0
function- computer
what is the range number and subnet mask number for class c
octet-192-223
subnet mask- 255.255.255.255.0
function- computer
what is the range number and subnet mask number for class d
octet-224-239
subnet mask N/A
function-broadcasting and multicasting
what is the range number and subnet mask number for class e
octet-240-255
subnet mask- N/A
function-research
what is a subnet mask
it is used to separate the network address portion of an ip address from the host address portion
the network address(defines the LAN) portion is always static while the host address portion is dynamic example class c ip 192.168.2.10 the subnet mask is 255.255.255.0 3 octet number is a network address and the last number is the host portion.
what is the subnet mask for ip adress 172.168.2.4 ? what is the network portion and the host portion? what class does it fall under ?
class b
subnet mask- 255.255.0.0
172.168. is the network portion and 2.4 is the host number.
understanding troubleshooting with network addresses.
only system with the same network address (sub mask) can talk to each other for ex: pc1 192.168.2.10 255.255.255.0 and pc2 192.168.2.11 255.255.255.0 these two system are able to communicate with each other.
example2 pc1 192.168.2.10 255.255.0.0 pc2 192.168.2.11 255.255.255.0 these two system can NOT talk to each other because they do not have the same network address (sub mask)
what is CIDR
is used to converse ip addresses, it occurs when standrd ip address class format is not respected.
how many ip network can systems receive for class c in the LAN. how many computers can you have in a class c network.
maximum 254
what is the loopback address
127.0.0.1
it is used to troubleshoot the ip stack of a system
what is a ip stack
it is the program that runs the ip system of an os
