diff --git a/1/PAR/assignments/t5-subnetting-clase-b.txt b/1/PAR/assignments/t5-subnetting-clase-b.txt
new file mode 100644
index 0000000..328a70d
--- /dev/null
+++ b/1/PAR/assignments/t5-subnetting-clase-b.txt
@@ -0,0 +1,35 @@
+Clase B
+
+147.8.0.0 > 16 bits para subredes y hosts.
+
+9 subredes
+
+9 ~= 2^4 => 4 bits de subred
+
+
+Direcciones de red:
+
+SNet  Hosts                    Dir. SNet      Dir. Bcast
+---- --------------            -----------    -------------
+0000 0000.0000 0000 = 0.0   => 147.8.0.0   => 147.8.15.255
+0001 0000.0000 0000 = 16.0  => 147.8.16.0  => 147.8.31.255
+0010 0000.0000 0000 = 32.0  => 147.8.32.0  => 147.8.47.255
+0011 0000.0000 0000 = 48.0  => 147.8.48.0  => 147.8.63.255
+0100 0000.0000 0000 = 64.0  => 147.8.64.0  => 147.8.79.255
+0101 0000.0000 0000 = 80.0  => 147.8.80.0  => 147.8.95.255
+0110 0000.0000 0000 = 96.0  => 147.8.96.0  => 147.8.111.255
+0111 0000.0000 0000 = 112.0 => 147.8.112.0 => 147.8.127.255
+1000 0000.0000 0000 = 128.0 => 147.8.128.0 => 147.8.143.255
+
+El número de hosts por cada una es igual a `2^(16-4) - 2 = 4094`
+
+Las direcciones de IP válidas para dispositivos serían:
+Subred 1: 147.8.0.1 - 147.8.15.254
+Subred 2: 147.8.16.1 - 147.8.31.254
+Subred 3: 147.8.32.1 - 147.8.47.254
+Subred 4: 147.8.48.1 - 147.8.63.254
+Subred 5: 147.8.64.1 - 147.8.79.254
+Subred 6: 147.8.80.1 - 147.8.95.254
+Subred 7: 147.8.96.1 - 147.8.111.254
+Subred 8: 147.8.112.1 - 147.8.127.254
+Subred 9: 147.8.128.1 - 147.8.143.254