458667
Description
Flashcards by Joshua Snider, updated more than 1 year ago
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Created by Joshua Snider
almost 11 years ago
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| Question | Answer |
| 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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