Network Protocols Flashcards
Convert to Binary Octet = 234
11101010
Convert to Binary Octet = 168
10101000
Convert to Binary Octet = 99
01100011
Convert to Binary Octet = 25
00011001
Convert to Binary Octet = 189
10111101
Convert to Digital = 01010101
85
Convert to Digital = 10011111
159
Convert to Digital = 00111001
57
Convert to Digital = 10011100
156
Convert to Digital = 11011001
217
How does the network ID in an IP address relate to the host ID?
The network ID on the left identifies the subnet the host belongs to, and the host ID on the right identifies its place on that subnet. Each can vary in length, but the two together are always 32 bits.
How can classful addresses be used in a classless address system?
CIDR is backwards-compatible. Existing class A, B, and C addresses just have subnet prefixes of /8, /16, and /24 respectively.
What can you tell about this address: 10.124.1.92
It’s a private network address, routable within an organization but not on the Internet.
What can you tell about this address: 127.0.0.1
It’s a loopback address: packets sent there just return to the local host.
What can you tell about this address: 169.254.1.13
It’s a self-assigned address, which works on the local segment but can’t be routed.
What can you tell about this subnet mask: 255.0.255.0
It’s not a valid subnet mask since it doesn’t have contiguous 1s followed by contiguous 0s. The host is improperly configured.
Loopback IPv6
::1/128 returns to the same interface. Equivalent to 127.0.0.1/8 in IPv4.
Link-local IPv6
Usable on the local segment, but not routable.
Unique local IPv6
Routable within a private network, such as one managed by a single organization or group of organizations, but not on the public internet.
Global IPv6
Routable on public networks such as the Internet
Why is IPv6 being adopted?
The most pressing reason is the depletion of available IPv4 addresses, but it also makes network configuration easier, routing more efficient, and security stronger.
What address scopes can an IPv6 unicast address have?
From smallest to largest: loopback, link-local, unique local, and global.
What IPv6 address would take the place of 127.0.0.1?
::1/128 is the IPv6 loopback address.
What can you tell about this IPv6 address: fe80::c2ad:5783:91:12c2
It’s a link-local address, self-assigned and only usable on the local network segment.