03 Flashcards
What is the first six bytes in anipv4 packet?
destination address
What is bytes 7-12 in an ipv4 packet?
source address
What is bytes 13-14 in an ipv4 packet?
next protocol
What is the first and second bit of byte 15 in Ipv4 packet??
What version of IP/ The Header length = (5-F)*4
What is byte 13-16 in an IPV4 packet?
source ip
What are the parameters of Time to Last in an IPV4 packet?
Time to Last
40 = (Unix/64 hops)
80 = (windows/128 hops)
FF = (Cisco/255 hops)
What are the options of Protocol connection in an IPV4 packet? What byte is it always located on?
Protocol Connection
01 = ICMP
06 = TCP (connection Oriented)
11 = UDP (connectionless)
10th
What is byte 13-16 In an IPV4 packet?
Source IP
What is bytes 17-20 in an IPV4 packet?
Target IP
How do you convert from hex too dotted decimal notion?
0A:5A:7B:01:0A:5A:7B:64
you multiply the first bit 0|A by 16 and the second by 1 and then add the two togeather
The _____ is a list of networks and paths the router references for decisions on packet forwarding
Routing Table
What is manually built by the administrator in a Routing table?
static routes
What Routes are learned from other routes in a Routing table?
dynamic routes
What is used by a routing table if there is no entry for destination? What’s the process?
default route, sending traffic to the next-hop router for forwarding
A ________ is required for each network that needs to communicate with a different network, The ______ is a ________________________________
Default gateway, router that connects LAN to WAN
___________ known as non-routable addresses, have been reserved for private networks and are not routed across the internet
Private IP ranges
169.254.0.0 /16 is primarily used by __________ and is called _________ allows _____________ to communicate on the LAN
Windows hosts, APIPA, windows machines
127.0.0.0 /8 is called the __________ address range, the entire subnet is reserved for testing NIC’s ability to send or receive traffic
loopback
Class D range of 224.0.0/4 is reserved for?
Class E range of 224.0/4 is reserved for?
multi casting use
experimentation and research use
What is the common representation of an IP address?
Dotted notation
The ______ is a number similar to an IP address, that defines where the network bits stop and the host bits begins
Subnet mask
The most prevalent logical address is _________
Internet Protocol IP
What are the private ip ranges for Class A,B, and C?
10.0.0.0 /8
172.16.0.0 /12
192.168.0.0 /16
In a subnetting table what are the numbers that follow SMN?
128 192 224 240 248 252 254 255
What do you do if your bit value is bigger then the octet of interest?
for the in-between do 0/number that you are given-1, when doing broad cast and beyond add 255 but do not take from octet of intrest
