update example for reserved network types

Author: dmitsh

Diff for: keps/sig-network/4962-network-topology-standard/README.md

@@ -254,29 +254,37 @@ If provided, Network QoS Annotations can be used to refine and enhance the detai
 
 #### Example of Network Topology Labels with reserved network types:
 
+Consider the following network topology:
+
+![Netwotk topology with reserved network types](./img/topo-reserved-labels.png)
+
+Let's examine node `vm12` as an example. This node is connected to NVSwitch `nvl10` and network switch sw11, which in turn is connected to switches `sw21` and `sw31`.
+In this case, the node labels would be:
 ```
-network.topology.kubernetes.io/accelerator: nvl72-a
-network.topology.kubernetes.io/block: block-b
-network.topology.kubernetes.io/datacenter: dc-c
-network.topology.kubernetes.io/zone: zone-d
+network.topology.kubernetes.io/accelerator: nvl10
+network.topology.kubernetes.io/block: sw11
+network.topology.kubernetes.io/datacenter: sw21
+network.topology.kubernetes.io/zone: sw31
 ```
 
 #### Example of Network QoS Annotations that complements the example above:
+
+If we have additional information such as latency and/or bandwidth between the node and the switches, it can be provided in an annotation:
 ```
 network.qos.kubernetes.io/switches: {
-   "nvl72-a": {
+   "nvl10": {
       "latency": "2us",
       "bandwidth": "100Gbps"
    },
-   "block-b": {
+   "sw11": {
       "latency": "50us",
       "bandwidth": "40Gbps"
    },
-   "dc-c": {
+   "sw21": {
       "latency": "500us",
       "bandwidth": "20Gbps"
    },
-  "zone-d": {
+  "sw31": {
       "latency": "1ms",
       "bandwidth": "10Gbps"
    }