Network layer
The third layer
what are the two most commonly referenced fields in the header?
Source and Destination IP addresses
Why is IPV4 being phased out to be replaced by IPV6? List a few examples
IPV4 address depletion
Lack of end-to-end connectivity
Increased network complexity
Where can a host send packets?
Itself
A local host
Remote host
What happens when a packet arrives at a router's interface?
The router examines the destination IP address of the packet and searches the routing table to decide where to forward the packet.
What action does IP take when encapsulating the transport layer?
Ip adds an IP header which is then used to deliver the packet to the destination host.
What action do the Internet header length, total length, and header checksum share?
Validating the packet.
How does IPV6 improve upon IPv4?
Increased address space using 128 bits instead of 32.
simplified and few fields
No need for NAT
Describe the default gateway
Local Ip address sits in the same address range as other hosts on a local network
accepts data into the local network and forwards it out
Routs Traffic
Used to access networks outside the local network
What are the 3 different types of route entires?
Directly connected networks
remote networks
Default routes
Describe the three characteristics of IP
IP is connectionless, best effort and media independent
True or False: The source and destination IPv4 addresses remain the same when traveling from the source to the destination
True
Which field in IPV6 replaces the IPV4 TTL(Time to Live)
Hop Limit
What protocol automatically distributes IP addresses
DHCP
In What 2 ways can a router learn about remote networks?
Manually
Dynamically
What occurs during fragmentation forwarding?
An IP packet is being forwarded from one medium to another with a smaller MTU
What is the Time to Live header used for?
To ensure the IPV4 packet doesn't stay in traffic for too long and slow everything down
What action does the "Next Header" perform
reveals the type of data payload the packet is carrying
Which command displays the IPv4 and IPv6 routing table?
Netroute -l
Netstat -r
route print
print net
netstat -r
route print
What route is known as a last resort?
default route
remote route
static route
Directly connected route
default route
Through which layer does the OSI model send segments to be encapsulated?
Transport layer
How does IPv4 keep track of fragments?
Using Identification, flags, and Fragment offset fields
True or False: An IPV6 header consists of 20 octets and 12 header fields
False: the IPv6 header has 40 octets and 8 header fields.
How does IPv4 determine if the destination address is on its own network?
using its own subnet mask, its own address, and the destination address
What does the "show ip route" command display?
The IPv4 routing table on a cisco IOS router