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--- eg-253:networkq:653764 [2012/12/06 09:01] – [Question 13] eechris
+++ eg-253:networkq:653764 [2012/12/06 10:15] (current) – [Question 24] eechris
@@ Line 216: / Line 216: @@
 in HTML, and then send it back to the user.
-**Not really, it acts as a gateway to the rest of the internet. Note that the network part of the gateway's IP address matches that of your host. Any packets sent to an IP address with a different network address will be sent to the gateway. That gateway (which is a router) will forward it on to the next network [192.168.1.0 via 192.168.1.3]. The match is performed again, and if necessary, the packet will be forwarded to the next gateway (which in this context will be solaris [192.168.1.1]) which will forward it to the campus network 137.44.... and if necessary, further on through one of the Campus routers and so on.**
+**Not really, it acts as a gateway to the rest of the internet. Note that the network part of the gateway's IP address matches that of your host. Any packets sent to an IP address with a different network address will be sent to the gateway. That gateway (which is a router) will forward it on to the next network [192.168.1.0 via 192.168.1.4]. The match is performed again, and if necessary, the packet will be forwarded to the next gateway (which in this context will be solaris [192.168.1.1]) which will forward it to the campus network 137.44.... and if necessary, further on through one of the Campus routers and so on.**
  --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 02:49//
@@ Line 257: / Line 257: @@
 **Answer**:
   ip_forward=yes
+**Answer is //IP forwarding//. Your answer would be part of the later question.**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:09//
 ==== Question 17 ====
@@ Line 270: / Line 274: @@
   icct@hyperion:~$ ssh jupiter
   icct@jupiter:~$ nano /etc/network/options
+**Because the question asks for the //file name//, a better answer would be ''jupiter:/etc/network/options'' -- but in actual fact, for your network the correct answer is
+''saturn:/etc/network/options'', because the gateway router for your host is //saturn//!**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:07//
 Reproduce the contents of the file defined in [[#question_17|Question 17]] to make a Ubuntu host into a router?
@@ Line 280: / Line 289: @@
 ==== Question 19 ====
@@ Line 287: / Line 295: @@
 **Answer**:
   up    route add -net 192.168.3.0 netmask 255.255.255.0 gw 192.168.1.4
+**What about down?**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:09//
 **Contents**:
@@ Line 324: / Line 337: @@
+**Yes, except, you should have reproduced the file for saturn!**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:22//
 ===== Checking Your Network =====
@@ Line 354: / Line 369: @@
     irtt: Initial RTT (Round Trip Time).
     Iface: Interface to which packets for this route will be sent.
+**Good idea to use the documentation for the definition, but what does it do in words that you and I could understand?**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:11//
 ==== Question 21 ====
@@ Line 382: / Line 402: @@
       - R: Interface is running.
       - U: Interface is up.
+**If anything, the official documentation of ''netstat -i'' is even more opaque. What does it really show us?**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:12//
 ==== Question 22 ====
@@ Line 405: / Line 429: @@
 </cli>
-  The option -t shows active TCP connections. Providing the -a also shows sockets that are waiting for a connection.
+The option -t shows active TCP connections. Providing the -a also shows sockets that are waiting for a connection.
-  The command netstat -ta will display a list of all servers that are currently running on your system.
+The command netstat -ta will display a list of all servers that are currently running on your system.
+**Good, that's what I was after for the previous two questions!**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:13//
 ===== Testing the Connectivity of your network =====
@@ Line 422: / Line 450: @@
 </cli>
+**The question asks you to provide a route to another network. You should have used something on //jupiter.icct.com// or //icct.com//. There would then have been at least 2 hops.**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 03:14//
@@ Line 465: / Line 495: @@
 </cli>
-  When you connect to another computer, your traffic does not go directly to the machine you are attempting to connect
+When you connect to another computer, your traffic does not go directly to the machine you are attempting to connect
-  to. Instead it goes through multiple machines on the Internet known as routers. These machines serve the sole purpose
+to. Instead it goes through multiple machines on the Internet known as routers. These machines serve the sole purpose
-  of controlling how your traffic gets to your destination. If any one connection fails, you will not be able to connect
+of controlling how your traffic gets to your destination. If any one connection fails, you will not be able to connect
-  to the intended destination.
+to the intended destination.
+**How do you explain the no-reply status of hops 2-30? Do you think that there are there really 30 networks between hyperion.saturn.icct.com and www.swan.ac.uk?**
+ --- //[[chris@cpjobling.me|Chris Jobling]] 2012/12/06 04:15//
 ===== Extension Questions =====