Chapter 8-IP Address flashcards

Pregunta	Respuesta
What does 255.255.255.255 indicate the packet is being sent to	All networks and all hosts
What does 172.16.255.255 designate a packet is being sent to	All subnets and all hosts on the 172.16 network
What is the major reason why hierarchical IP address schemes are so important	To make routing possible-if it weren't hierarchical, every router would have to store every host address
What does the network address of an IP address identify	The network that the host machine is on
What does the host address part of the IP address indicate	The address of the host on whatever network it is on
What octet(s) is(are) used for a network address for a class A IP address and same for a host address.	First is Network, 2nd 3rd and 4th are host.
What octet(s) is(are) used for a network address for a class B IP address and same for a host address.	1st and 2nd are network, 3rd and 4th are host
What octet(s) is(are) used for a network address for a class C IP address and same for a host address.	1st, 2nd and 3rd are network. 4th is host.
What is the range of values for the first octet of a class A IP address	0-127
What is the range of values for the first octet of a class B IP address	128-191
What is the range of values for the first octet of a class C IP address	192-223
What is the first octet range for the Class D multicast address	224-239
What is the significance of an IP address where are the host address bits are disabled?	Any host
What is the significance of all bits in an IP address disabled	Any network.
All host bits enabled = ???	Packet meant for all hosts on the current network
All IP address bits enabled = ???	Broadcasts to all hosts on the network
What are 2 reasons private IP addresses are used?	For security and to save IP address space.
What does a NAT do?	Converts private (non-routable) IP addresses to a public (routable) IP address for internet communication.
What is the APIPA address range?	169.254.x.y
What is the benefit of the APIPA address scheme	To communicate with other hosts on a network even though the DHCP server is down.
To which machines does a layer 2 broadcast go?	All hosts on a LAN
To which machines does a layer 3 broadcast go?	To all hosts on a network
What is a possible disadvantage of multicasting	LAN congestion
Describe multicasting	Packets are sent from a host on one network to a number of hosts on one or more networks.
How many bits are in an IPv6 address and what notation is used?	128; hexadecimal
what is a unicast address?	Assigned to a single interface
what is a global unicast address?	A publicly routable unique IP address. Similar to unique public IP address with IPv4
What are link-local addresses in IPv6	Similar to private IP addresses in IPv4. These are not routable on the internet
What is a unique-local address in IPv6?	Nearly globally unique IP addresses similar to private IP addresses but able to be routable to multiple local networks.
What is a multicast address in IPv6	A one-to-many addressing scheme.
What is an anycast address in IPv6?	A one-to-one-of-many. It delivers a packet to the first IPv6 address it finds defined in terms of routing distance.
What is ::	Similar to IPv4's 0.0.0.0. It is the address of a host when using DHCP (before config)
What is ::1	Equivalent to 127.0.0.1 in IPv4
What is 0:0:0:0:0:0:192.168.100.1	This is 192.168.100.1 written in IPv4/IPv6 mixed addressing scheme.
What is 2000::/3	Global unicast address in IPv6
What is FC00:/7	The unique local unicast address range in IPv6
What is FE80::/10	The link-local unicast range
What is FF00::/8	The multicast range in IPv6
Why the need for transition to IPv6	Running out of public IP addresses in IPv4
What are some benefits of IPv6	Better security, less overhead, no broadcasts, routing is more efficient/scalable

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