- What does 255.255 255.0 tell a router?
- What is the 0.0 0.0 IP address?
- What is FFFF FFFF MAC address?
- What is the purpose of 127.0 0.0 IP address?
- How many IPs is a 16?
- What are the 4 parts of an IP address?
- What is a 255.255 subnet?
- What does IP route 0.0 0.0 0.0 0.0 mean?
- What is Unicast MAC address?
- What is a 16 subnet?
- What is the maximum IP address?
- Why is subnet mask used?
- Is subnet mask always 255?
- Is an IP address ending in 255 valid?
- What IP address Cannot be used?
- Can an IP address end in zero?
- What destination address is 255.255 255.255 for?
- What is 192.168 called?
- Can two devices have same MAC address?
- What does FF FF FF FF FF FF mean?
- How many 24s are in a 16?
What does 255.255 255.0 tell a router?
Originally Answered: What does the subnet mask 255.255.
255.0 tell a router.
It is what is called a “subnet mask” (or subnetwork mask).
It basically allows up to 256 devices (each with their own IP address) to connect to the network (LAN) that your router monitors..
What is the 0.0 0.0 IP address?
In the Internet Protocol Version 4, the address 0.0. 0.0 is a non-routable meta-address used to designate an invalid, unknown or non-applicable target. This address is assigned specific meanings in a number of contexts, such as on clients or on servers.
What is FFFF FFFF MAC address?
ffff. ffff , this is the special reserved MAC address indicating a broadcast frame. This is what makes an ARP Request a broadcast. Had Host A chosen to send this frame using a specific host’s MAC address in the destination, then the ARP request would have been unicast.
What is the purpose of 127.0 0.0 IP address?
Network 127.0. 0.0 is reserved for IP traffic local to your host. Usually, address 127.0. 0.1 will be assigned to a special interface on your host, the loopback interface, which acts like a closed circuit.
How many IPs is a 16?
CIDR, Subnet Masks, and Usable IP Addresses Quick Reference Guide (Cheat Sheet)CIDRSubnet MaskTotal IPs/19255.255.224.08192/18255.255.192.016,384/17255.255.128.032,768/16255.255.0.065,53629 more rows•Aug 26, 2011
What are the 4 parts of an IP address?
IP Address ComponentsAddress Class. Early in the development of IP, the IANA (Internet Assigned Numbers Authority) designated five classes of IP address: A, B, C, D, and E. … Default Subnet Mask. … The Network Field. … The Host Field. … Non-default Masks. … The Subnet Field.
What is a 255.255 subnet?
A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). … This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256). The largest Class A networks use a subnet mask of 255.0.
What does IP route 0.0 0.0 0.0 0.0 mean?
Explanation. IP route 0.0. 0.0 0.0. 0.0 Fa0/0 in plain English means “packets from any IP address with any subnet mask get sent to Fa0/0”. Without any other more specific routes defined, this router will send all traffic to Fa0/0.
What is Unicast MAC address?
A unicast MAC address is the unique address used when a frame is sent from a single transmitting device to a single destination device. … A corresponding destination MAC address must also be present in the Ethernet frame header. The IP address and MAC address combine to deliver data to one specific destination host.
What is a 16 subnet?
The last three octets of a Class A subnet mask are used to address hosts on a LAN; the 24 bits you can manipulate however you wish. … It saves you from typing, or pronouncing, the whole mask. For example, /8 means 255.0. 0.0, /16 is 255.255. 0.0, and /24 is 255.255.
What is the maximum IP address?
IPv4 uses 32-bit IP address, and with 32 bits the maximum number of IP addresses is 232—or 4,294,967,296. This provides a little more than four billion IPv4 addresses (in theory). The number of IPv4 available addresses is actually less than the theoretical maximum number.
Why is subnet mask used?
A subnet mask is used to divide an IP address into two parts. One part identifies the host (computer), the other part identifies the network to which it belongs. To better understand how IP addresses and subnet masks work, look at an IP (Internet Protocol) address and see how it is organized.
Is subnet mask always 255?
hmm Almost every small network uses a subnet mask of 255.255. 255.0 and this allows for 255 IP addresses on that network. … A subnet mask is a binary mask made up of all 1, contiguous.
Is an IP address ending in 255 valid?
Yes, an IPv4 address can end in 255 without being a broadcast address. For it to be a broadcast address, all bits in the host part need to be ones. In your example, the 32-17 = 15 rightmost bits need to be all ones, not only the rightmost eight. For example, 10.0.
What IP address Cannot be used?
Two addresses that cannot be used in your example are 192.168. 123.0 and 192.168. 123.255 because binary addresses with a host portion of all ones and all zeros are invalid. The zero address is invalid because it is used to specify a network without specifying a host.
Can an IP address end in zero?
In general, the first and last addresses in a subnet are used as the network identifier and broadcast address, respectively. … For example, IP addresses of networks with subnet masks of at least 24 bits ending in . 0 or . 255 can never be assigned to hosts.
What destination address is 255.255 255.255 for?
255.255. 255.255: This address is reserved for network broadcasts, or messages that should go to all computers on the network. 127.0. 0.1: This is called the loopback address, meaning your computer’s way of identifying itself, whether or not it has an assigned IP address.
What is 192.168 called?
192.168. 1.1 is a common factory IP address for a consumer-grade router. If the router is used for connecting to the Internet then all computers and devices which access the Internet through it will use this address as their default gateway.
Can two devices have same MAC address?
If two devices have the same MAC Address (which occurs more often than network administrators would like), neither computer can communicate properly. … Duplicate MAC Addresses separated by one or more routers is not a problem since the two devices won’t see each other and will use the router to communicate.
What does FF FF FF FF FF FF mean?
You can clearly see that the “MAC destination address” is set to FF:FF:FF:FF:FF:FF. The “Address IP destination” is set to 255.255. 255.255, this is the IP broadcast address and ensures that no matter what IP address the receiving computer(s) have, they will not reject the data but process it.
How many 24s are in a 16?
Since you have 8 more bits to use to define the network in the /24 subnets under the /16, there are 256 /24 subnets in a specific /16.