gizmo24
01-01-2009, 12:28 PM
I'm having some troubles interpreting the subnet prefixes used in LAB_A and LAB_B in the IP Address Problems 1 & 2 shown in figures 3.18 and 3.19.
Both figures include a model 1900 switch in LAB_A which has two LAN segments labelled F0/27 and F0/26. Do the numbers following the forward slashes represent switch port numbers or IP subnet prefixes?
The second question deals with the subnet prefixes used by the F0/0 router interfaces in both LAB_A and LAB_B as shown in figure 3.18.
In order for the interfaces on both routers to have a network block of 32 (as stated in the text) and the interface in LAB_B to be the broadcast address of subnet 192.168.1.64, both IP addresses must have a prefix of /27 (and mask of 255.255.255.224). The prefix seems to be implied.
I believe that figure 3.18 (and figure 3.19 with a different prefix) should be modified to indicate that both IP addresses have a prefix of /27:
192.168.1.62/27
192.168.1.95/27
Both figures include a model 1900 switch in LAB_A which has two LAN segments labelled F0/27 and F0/26. Do the numbers following the forward slashes represent switch port numbers or IP subnet prefixes?
The second question deals with the subnet prefixes used by the F0/0 router interfaces in both LAB_A and LAB_B as shown in figure 3.18.
In order for the interfaces on both routers to have a network block of 32 (as stated in the text) and the interface in LAB_B to be the broadcast address of subnet 192.168.1.64, both IP addresses must have a prefix of /27 (and mask of 255.255.255.224). The prefix seems to be implied.
I believe that figure 3.18 (and figure 3.19 with a different prefix) should be modified to indicate that both IP addresses have a prefix of /27:
192.168.1.62/27
192.168.1.95/27