Objective: Explain and employ network addressing. For all of the columns below use the IP address: 175.30.101.205 Instructions: 1. The first 3 columns are different ways of viewing the subnet mask. You are given the subnet mask as one of the 3, and you need to complete the other two representations for each row. Complete these 3 columns first. 2 3 1/28 5 6 4 /30 2. Proceed to complete the Increment by determining the value of the last network bit for the given subnet mask. It is easiest to observe in the binary representation. 8 3. Since network IDs will always be multiples of the increment (after the zero subnet) - in the octet that holds the last network bit, use the increment to determine the network ID, broadcast, given the subnet mask for that row. and host range for the IP address displayed above, Slash Notation 9 7 122 Network+ Learning Activity #23 - Subnet Masks and Subnetting 10 /21 Binary Subnet Mask 11111111 111111.11111111.11100000 11111111 11111111.11111111.1100000000000000 111110.00000000 Dotted Decimal Subnet Mask 255.255.255.192 255.255.240.0 255.255.224.0 Increment Network Broadcast Host Range

CIS269 Packet Translation Lab   Break down the following IP datagram into its individual fields, listing the value of each. Hint:  It’s an IP datagram containing a TCP segment containing another protocol…   45        00        00        31 94        00        40        00 80        06        1B       9F 80        A3       C9       29 D8       45        29        15 04        09        00        15 00        00        C3       A1 DF       65        A8       45 50        18        20        AA 8E       8C       00        00 43        57        44        20 66        75        6E       0D 0A

The message to be sent from source to destination is 4000B.  The link MTU's from source to destination are 1500, 1000, and 750. If we  DO NOT use Path MTU, what are the respective fragment sizes to be reassembled? If we DO use Path MTU, what are the respective fragment sizes to be reassembled? Remember, assume that the L3 and L4 headers have length=0.

SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. You have defined the packet filter rule set shown in the table below. These rules permit and/or deny inbound and outbound traffic between the user agent and the mail server. Describe the purpose of each packet filter rule in the table.  Rule Direction Source Address Destination Address Protocol Destination Port Action A2 In External Internal TCP 25 Permit B2 Out Internal External TCP > 1023 Permit C2 Out Internal External TCP 25 Permit D2 In External Internal TCP > 1023 Permit E2 Either Any Any Any Any Deny