3 IP Addressing and Network Configuration Free Online FlashCards

What does an IP address identify?

An IP address identifies a network interface so it can send and receive Internet Protocol traffic.

How is an IPv4 address structured and usually written?

IPv4 addresses are 32 bits long and are usually written as four decimal octets, such as 192.168.10.70.

What does an IP prefix length specify?

A prefix length gives the number of leading bits that identify the network; the remaining bits identify hosts.

What do the 1-bits and 0-bits in an IPv4 subnet mask mark?

In a subnet mask, 1-bits mark the network portion of an IPv4 address and 0-bits mark the host portion.

How many ordinary host addresses does a conventional IPv4 subnet provide?

With $h$ host bits, a conventional IPv4 subnet has $2^h$ total addresses; typically, $2^h - 2$ remain for ordinary hosts.

Which addresses are usable hosts in 192.168.10.64/26?

192.168.10.64/26 spans .64–.127: .64 is the subnet address, .127 the broadcast address, and .65–.126 are available for hosts.

Which three IPv4 blocks are reserved for private networks?

The private IPv4 blocks are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. They are for private networks, not globally unique Internet destinations.

How are IPv6 addresses written and shortened?

IPv6 addresses are 128 bits, written as eight hexadecimal groups separated by colons. Leading zeros may be omitted, and :: compresses consecutive all-zero groups; it can appear only once.

Which address types does IPv6 use, and which does it lack?

IPv6 includes unicast, anycast, and multicast addresses, but it has no broadcast address.

What are the purposes of fe80::/10 and fc00::/7?

IPv6 link-local addresses use fe80::/10 for communication on the local link. Unique-local addresses use fc00::/7 for local addressing and are not intended to be globally reachable.

What is static IP configuration?

With static configuration, an administrator enters the address and other settings manually. The address must fit the subnet and avoid conflicts.

What can DHCP provide to an IPv4 host?

A DHCP server assigns an IPv4 address for a lease period and can also provide settings such as the subnet mask and router.