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
