Network+ Homework #1 The homework assignment is not completely posted
until this underlined message is completely red
4/28/2002: assignment complete
1. a. Report the following decimal numbers as binary and hexadecimal numbers
Split the binary representation into two 4-bit parts to clarify the binary/hex relationship
Report hex numbers with a leading 0x to indicate hex
254 11111110 FE 31 00011111 1F
252 11111100 FC 63 00111111 3F
248 11111000 F8 95 01011111 5F
240 11110000 F0 127 01111111 7F
224 11100000 E0 159 10011111 9F
192 11000000 C0 191 10111111 BF
128 10000000 80 223 11011111 DF
255 11111111 FF
These are subnet numbers used in TCP/IP These are broadcast addresses
on a common subnetting scheme
149 10010101 95
137 10001001 89
196 11000100 C4
46 00101110 2E
9 00001001 09
4 00000100 04
Some random numbers
b. Report these binary numbers as Hexadecimal (preface with 0x) and decimal
10010110 0096 150
101010101 0155 341
1011001100110 1666 5734
10000001 0081 129
11110001 00F1 241
c. Report the following hexadecimal numbers as binary and decimal
FACE 1111 1010 1100 1110 64206
FEDBEEF 1111 1110 1101 1011 1110 1110 1111 267239151
FEEDFACE 1111 1110 1110 1101 1111 1010 1100 1110 4277009102
FEEBEEF 1111 1110 1110 1011 1110 1110 1111 267304687
1 0001 1
BADBAC 1011 1010 1101 1011 1010 1100 12245932
10 0000 0000 0001 0000 16
100 0000 0001 0000 0000 256
1000 0001 0000 0000 0000 4096
800 0000 1000 0000 0000 2048
806 0000 1000 0000 0110 2054
8000 1000 0000 0000 0000 32768
2. a. Which RFCs specifically define OSPF 2328
b. What does OSPF do? Routing Protocol
c. Who is the author of OSPF John Moy
c. What site did you use to find the answers to this question? www.rfc-editor.org
3. Consider the following network (read ahead or wait for Tuesday's lecture):
remember there are only three fields to fill in
The blue lines indicate E'net segments in this exercise and the succeeding one
Host1 IP: 172.18.5.220   Host2 IP: 172.18.5.10
Host1     Host2
MAC: 00-80-C6-F7-37-2D   MAC: 00-80-C6-E3-02-AC
 
a. What will the DIX EthernetII frame header look like if Host1 sends a ping to Host2?
 00-80-C6-E3-02-AC 00-80-C6-F7-37-2D 0x800
b. What will the DIX E'netII frame header for Host2's reply to Host1look like?
00-80-C6-F7-37-2D  00-80-C6-E3-02-AC 0x800
c. What will the E'net 802.2 frame header look like for an ARP request from Host 1 for Host2's IP address
(network has been reconfigured to 802.2)?
FF-FF-FF-FF-FF-FF  00-80-C6-F7-37-2D 0X2E (length)
4. Consider the following network (read ahead or wait for Tuesday's lecture)
The MAC address for each Cisco router interface is next to the IP address for the interface
IP1: 172.18.5.1
Host1 IP: 172.18.5.220   MAC: 00-30-19-28-BC-B1   Host2 IP: 172.18.6.10
Host1     Cisco   Host2
MAC: 00-80-C6-F7-37-2D   Router     MAC: 00-80-C6-E3-02-AC
  MAC: 00-30-19-28-EF-03  
IP2: 172.18.6.1
a. What will the DIX EthernetII frame header look like if Host2 sends a ping to Host1?
00-30-19-28-EF-03 00-80-C6-E3-02-AC 0x800
b. What will the DIX E'netII frame header for Host1's reply to Host2 look like?
00-30-19-28-BC-B1 00-80-C6-F7-37-2D 0x800
c. What will the DIX E'netII frame header look like for an ARP request from Host 2 to set up the ping?
FF-FF-FF-FF-FF_FF  00-80-C6-E3-02-AC 0x806
5. The following MAC address components are in canonical format report them in non-canonical format
(remember the bits are swapped on a per-byte basis)
01 0000 0001    1000 0000 80 This 01 combination in the first byte of an ethernet MAC address indicates multicasting
C0 1100 0000    0000 0011 03 (The answer indicates a multicast sort of functional MAC address in Token Ring)
08 0000 1000    0001 0000 10
42 0100 0010    0100 0010 42
A5 1010 0101    1010 0101 A5
3E 0011 1110    0111 1100 7C