03

Question 1

What is the first six bytes in anipv4 packet?

Answer 1

destination address

Question 2

What is bytes 7-12 in an ipv4 packet?

Answer 2

source address

Question 3

What is bytes 13-14 in an ipv4 packet?

Answer 3

next protocol

Question 4

What is the first and second bit of byte 15 in Ipv4 packet??

Answer 4

What version of IP/ The Header length = (5-F)*4

Question 5

What is byte 13-16 in an IPV4 packet?

Answer 5

source ip

Question 6

What are the parameters of Time to Last in an IPV4 packet?

Answer 6

Time to Last
40 = (Unix/64 hops)
80 = (windows/128 hops)
FF = (Cisco/255 hops)

Question 7

What are the options of Protocol connection in an IPV4 packet? What byte is it always located on?

Answer 7

Protocol Connection

01 = ICMP
06 = TCP (connection Oriented)
11 = UDP (connectionless)

10th

Question 8

What is byte 13-16 In an IPV4 packet?

Answer 8

Source IP

Question 9

What is bytes 17-20 in an IPV4 packet?

Answer 9

Target IP

Question 10

How do you convert from hex too dotted decimal notion?

0A:5A:7B:01:0A:5A:7B:64

Answer 10

you multiply the first bit 0|A by 16 and the second by 1 and then add the two togeather

Question 11

The _____ is a list of networks and paths the router references for decisions on packet forwarding

Answer 11

Routing Table

Question 12

What is manually built by the administrator in a Routing table?

Answer 12

static routes

Question 13

What Routes are learned from other routes in a Routing table?

Answer 13

dynamic routes

Question 14

What is used by a routing table if there is no entry for destination? What’s the process?

Answer 14

default route, sending traffic to the next-hop router for forwarding

Question 15

A ________ is required for each network that needs to communicate with a different network, The ______ is a ________________________________

Answer 15

Default gateway, router that connects LAN to WAN

Question 16

___________ known as non-routable addresses, have been reserved for private networks and are not routed across the internet

Answer 16

Private IP ranges

Question 17

169.254.0.0 /16 is primarily used by __________ and is called _________ allows _____________ to communicate on the LAN

Answer 17

Windows hosts, APIPA, windows machines

Question 18

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

Answer 18

loopback

Question 19

Class D range of 224.0.0/4 is reserved for?
Class E range of 224.0/4 is reserved for?

Answer 19

multi casting use
experimentation and research use

Question 20

What is the common representation of an IP address?

Answer 20

Dotted notation

Question 21

The ______ is a number similar to an IP address, that defines where the network bits stop and the host bits begins

Answer 21

Subnet mask

Question 22

The most prevalent logical address is _________

Answer 22

Internet Protocol IP

Question 23

What are the private ip ranges for Class A,B, and C?

Answer 23

10.0.0.0 /8
172.16.0.0 /12
192.168.0.0 /16

Question 24

In a subnetting table what are the numbers that follow SMN?

Answer 24

128 192 224 240 248 252 254 255

Question 25

What do you do if your bit value is bigger then the octet of interest?

Answer 25

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