Lesson 4: Configuring IP Networks

Question 1

IPv4 routers must all have a ___

Answer 1

default gateway

Question 2

if any octet in subnet mask isn’t 255, ip octet always changes to ___

Answer 2

zero

Question 3

ipconfig is only used in what environment?

Answer 3

windows

Question 4

ifconfig is only used in what environment

Answer 4

linux

Question 5

in linux, eth0 is?

Answer 5

ethernet adapter

Question 6

in linux, lo is

Answer 6

loopback

Question 7

destination unreachable error cause:

Answer 7

no router to host (check default gateway)

Question 8

no reply/timeout cause:

Answer 8

firewall config, host/interface is down

Question 9

0.0.0.0/8 meaning

Answer 9

default route (non-routable for public world)

Question 10

255.255.255.255 meaing

Answer 10

full broadcast

Question 11

DORA

D-discover

Answer 11

always initiated by client machine
server listens on 68
dhcp responds on 67

Question 12

DORA

O-offer

Answer 12

dhcp does offer- leases client with an IP address

Question 13

DORA

R-request

Answer 13

client request to keep the lease

Question 14

DORA

A-acknowledge

Answer 14

acknowledge client lase or lease than been given out

Question 15

if lease is not renewed ___ happens

Answer 15

APIPA