BROCADE IP PRIMER

Chapter 2: TCP/IP9. I have an IP address of 192.168.100.100/27. What is my networkaddress?a. 192.168.100.0b. 192.168.100.100c. 192.168.100.27d. 192.168.100.9610. What class is 138.232.49.3 in?a. Class Ab. Class Bc. Class Cd. Class DAnswers to Review Questions1. b. UDP is connectionless. TCP is connection-oriented. IP and ARP are notLayer 4 protocols.2. a. SSL uses TCP 443. TCP 80 is HTTP. TCP 25 is SMTP. There is no wellknownprotocol for UDP 443.3. c. The subnet mask translates to 27 bits. 172.16.25.33 translates to1010 1100 . 0001 0000 . 0001 1001 . 0010 0001. The first 27 bits arein bold. This is the network address. That means that the broadcastaddress would be: 1010 1100 . 0001 0000 . 0001 1001 . 0011 1111 or172.16.25.63.4. d. The sequence is SYN - SYN/ACK - ACK. The last segment is an ACK.5. b. How many host bits do you need? Well, two bits will give you two usablehosts ( 2 x 2 = 4, then subtract 2 for network and broadcast addresses;you're left with 2 ). Three bits will give you six usable hosts ( 2 x 2 x 2 = 8;8 - 2 = 6 ). Four bits will give you 14 usable hosts ( 2 x 2 x 2 x 2 = 16; 16 -2 = 14 ). If you need four bits for the hosts, that leaves 28 bits for the network( 32 - 4 = 28 ). A 28-bit mask looks like 1111 1111 . 1111 1111 .1111 1111 . 1111 0000 (or 255.255.255.240).6. c. PAT translates based on both Layer 3 (IP) addresses and Layer 4 (TCP/UDP) ports. NAT translates based only on Layer 3 addresses. ARP is notreally a translation protocol, but it does match IP addresses to MACaddresses. ICMP is not a translation protocol.7. b. For questions like these, it's usually easier to work out the small numberfirst, so let's look at the network requirement. We know from question5 that four bits will give us 14 usable addresses. Five bits will give us 30usable addresses (2 x 2 x 2 x 2 x 2 = 32; 32 - 2 = 30). Six bits will give us62 usable addresses (2 x 2 x 2 x 2 x 2 x 2 = 64; 64 - 2 = 62), so six bits iswhat we need for the networks. 172.16.0.0 is a Class B IP network, so we72 Brocade IP Primer