diff --git a/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java
new file mode 100644
index 0000000..daa3ddf
--- /dev/null
+++ b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostManager.java
@@ -0,0 +1,166 @@
+package org.onlab.onos.net.trivial.host.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.event.AbstractListenerRegistry;
+import org.onlab.onos.event.EventDeliveryService;
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Host;
+import org.onlab.onos.net.HostId;
+import org.onlab.onos.net.host.HostDescription;
+import org.onlab.onos.net.host.HostEvent;
+import org.onlab.onos.net.host.HostListener;
+import org.onlab.onos.net.host.HostProvider;
+import org.onlab.onos.net.host.HostProviderRegistry;
+import org.onlab.onos.net.host.HostProviderService;
+import org.onlab.onos.net.host.HostService;
+import org.onlab.onos.net.provider.AbstractProviderRegistry;
+import org.onlab.onos.net.provider.AbstractProviderService;
+import org.onlab.packet.IPv4;
+import org.onlab.packet.MACAddress;
+import org.slf4j.Logger;
+
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Provides basic implementation of the host SB &amp; NB APIs.
+ */
+@Component(immediate = true)
+@Service
+public class SimpleHostManager
+        extends AbstractProviderRegistry<HostProvider, HostProviderService>
+        implements HostService, HostProviderRegistry {
+
+    public static final String HOST_ID_NULL = "Host ID cannot be null";
+    private final Logger log = getLogger(getClass());
+
+    private final AbstractListenerRegistry<HostEvent, HostListener>
+            listenerRegistry = new AbstractListenerRegistry<>();
+
+    private final SimpleHostStore store = new SimpleHostStore();
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    private EventDeliveryService eventDispatcher;
+
+
+    @Activate
+    public void activate() {
+        eventDispatcher.addSink(HostEvent.class, listenerRegistry);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        eventDispatcher.removeSink(HostEvent.class);
+        log.info("Stopped");
+    }
+
+    @Override
+    protected HostProviderService createProviderService(HostProvider provider) {
+        return new InternalHostProviderService(provider);
+    }
+
+    @Override
+    public int getHostCount() {
+        return store.getHostCount();
+    }
+
+    @Override
+    public Iterable<Host> getHosts() {
+        return store.getHosts();
+    }
+
+    @Override
+    public Host getHost(HostId hostId) {
+        checkNotNull(hostId, HOST_ID_NULL);
+        return store.getHost(hostId);
+    }
+
+    @Override
+    public Set<Host> getHostsByVlan(long vlanId) {
+        return store.getHosts(vlanId);
+    }
+
+    @Override
+    public Set<Host> getHostsByMac(MACAddress mac) {
+        checkNotNull(mac, "MAC address cannot be null");
+        return store.getHosts(mac);
+    }
+
+    @Override
+    public Set<Host> getHostsByIp(IPv4 ip) {
+        checkNotNull(ip, "IP address cannot be null");
+        return store.getHosts(ip);
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+        checkNotNull(connectPoint, "Connection point cannot be null");
+        return store.getConnectedHosts(connectPoint);
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(DeviceId deviceId) {
+        checkNotNull(deviceId, "Device ID cannot be null");
+        return store.getConnectedHosts(deviceId);
+    }
+
+    @Override
+    public void addListener(HostListener listener) {
+        listenerRegistry.addListener(listener);
+    }
+
+    @Override
+    public void removeListener(HostListener listener) {
+        listenerRegistry.removeListener(listener);
+    }
+
+    // Personalized host provider service issued to the supplied provider.
+    private class InternalHostProviderService
+            extends AbstractProviderService<HostProvider>
+            implements HostProviderService {
+
+        InternalHostProviderService(HostProvider provider) {
+            super(provider);
+        }
+
+        @Override
+        public void hostDetected(HostId hostId, HostDescription hostDescription) {
+            checkNotNull(hostId, HOST_ID_NULL);
+            checkValidity();
+            HostEvent event = store.createOrUpdateHost(provider().id(), hostId,
+                                                       hostDescription);
+            if (event != null) {
+                log.info("Host {} detected", hostId);
+                post(event);
+            }
+        }
+
+        @Override
+        public void hostVanished(HostId hostId) {
+            checkNotNull(hostId, HOST_ID_NULL);
+            checkValidity();
+            HostEvent event = store.removeHost(hostId);
+            if (event != null) {
+                log.info("Host {} vanished", hostId);
+                post(event);
+            }
+        }
+    }
+
+    // Posts the specified event to the local event dispatcher.
+    private void post(HostEvent event) {
+        if (event != null) {
+            eventDispatcher.post(event);
+        }
+    }
+
+}
diff --git a/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostStore.java b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostStore.java
new file mode 100644
index 0000000..ff2098e
--- /dev/null
+++ b/core/trivial/src/main/java/org/onlab/onos/net/trivial/host/impl/SimpleHostStore.java
@@ -0,0 +1,220 @@
+package org.onlab.onos.net.trivial.host.impl;
+
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DefaultHost;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Host;
+import org.onlab.onos.net.HostId;
+import org.onlab.onos.net.host.HostDescription;
+import org.onlab.onos.net.host.HostEvent;
+import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.packet.IPv4;
+import org.onlab.packet.MACAddress;
+
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Multimap;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static org.onlab.onos.net.host.HostEvent.Type.HOST_REMOVED;
+import static org.onlab.onos.net.host.HostEvent.Type.HOST_ADDED;
+import static org.onlab.onos.net.host.HostEvent.Type.HOST_UPDATED;
+import static org.onlab.onos.net.host.HostEvent.Type.HOST_MOVED;
+
+/**
+ * Manages inventory of end-station hosts using trivial in-memory
+ * implementation.
+ */
+public class SimpleHostStore {
+
+    private final Map<HostId, Host> hosts = new ConcurrentHashMap<>();
+
+    // hosts sorted based on their location
+    private final Multimap<ConnectPoint, Host> locations = HashMultimap.create();
+
+    /**
+     * Creates a new host or updates the existing one based on the specified
+     * description.
+     *
+     * @param providerId      provider identification
+     * @param hostId          host identification
+     * @param hostDescription host description data
+     * @return appropriate event or null if no change resulted
+     */
+    HostEvent createOrUpdateHost(ProviderId providerId, HostId hostId,
+                                 HostDescription hostDescription) {
+        Host host = hosts.get(hostId);
+        if (host == null) {
+            return createHost(providerId, hostId, hostDescription);
+        }
+        return updateHost(providerId, host, hostDescription);
+    }
+
+    // creates a new host and sends HOST_ADDED
+    private HostEvent createHost(ProviderId providerId, HostId hostId,
+                                 HostDescription descr) {
+        DefaultHost newhost = new DefaultHost(providerId, hostId,
+                                              descr.hwAddress(),
+                                              descr.vlan(),
+                                              descr.location(),
+                                              descr.ipAddresses());
+        synchronized (this) {
+            hosts.put(hostId, newhost);
+            locations.put(descr.location(), newhost);
+        }
+        return new HostEvent(HOST_ADDED, newhost);
+    }
+
+    // checks for type of update to host, sends appropriate event
+    private HostEvent updateHost(ProviderId providerId, Host host,
+                                 HostDescription descr) {
+        DefaultHost updated;
+        HostEvent event;
+        if (host.location().equals(descr.location())) {
+            updated = new DefaultHost(providerId, host.id(),
+                                      host.mac(),
+                                      host.vlan(),
+                                      host.location(),
+                                      descr.ipAddresses());
+            event = new HostEvent(HOST_UPDATED, updated);
+        } else {
+            updated = new DefaultHost(providerId, host.id(),
+                                      host.mac(),
+                                      host.vlan(),
+                                      descr.location(),
+                                      host.ipAddresses());
+            event = new HostEvent(HOST_MOVED, updated);
+        }
+        synchronized (this) {
+            hosts.put(host.id(), updated);
+            locations.remove(host.location(), host);
+            locations.put(updated.location(), updated);
+        }
+        return event;
+    }
+
+    /**
+     * Removes the specified host from the inventory.
+     *
+     * @param hostId host identification
+     * @return remove even or null if host was not found
+     */
+    HostEvent removeHost(HostId hostId) {
+        synchronized (this) {
+            Host host = hosts.remove(hostId);
+            if (host != null) {
+                locations.remove((host.location()), host);
+                return new HostEvent(HOST_REMOVED, host);
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Returns the number of hosts in the store.
+     *
+     * @return host count
+     */
+    int getHostCount() {
+        return hosts.size();
+    }
+
+    /**
+     * Returns a collection of all hosts in the store.
+     *
+     * @return iterable collection of all hosts
+     */
+    Iterable<Host> getHosts() {
+        return Collections.unmodifiableSet(new HashSet<Host>(hosts.values()));
+    }
+
+    /**
+     * Returns the host with the specified identifer.
+     *
+     * @param hostId host identification
+     * @return host or null if not found
+     */
+    Host getHost(HostId hostId) {
+        return hosts.get(hostId);
+    }
+
+    /**
+     * Returns the set of all hosts within the specified VLAN.
+     *
+     * @param vlanId vlan id
+     * @return set of hosts in the vlan
+     */
+    Set<Host> getHosts(long vlanId) {
+        Set<Host> vlanset = new HashSet<Host>();
+        for (Host h : hosts.values()) {
+            if (h.vlan() == vlanId) {
+                vlanset.add(h);
+            }
+        }
+        return vlanset;
+    }
+
+    /**
+     * Returns the set of hosts with the specified MAC address.
+     *
+     * @param mac mac address
+     * @return set of hosts with the given mac
+     */
+    Set<Host> getHosts(MACAddress mac) {
+        Set<Host> macset = new HashSet<>();
+        for (Host h : hosts.values()) {
+            if (h.mac().equals(mac)) {
+                macset.add(h);
+            }
+        }
+        return macset;
+    }
+
+    /**
+     * Returns the set of hosts with the specified IP address.
+     *
+     * @param ip ip address
+     * @return set of hosts with the given IP
+     */
+    Set<Host> getHosts(IPv4 ip) {
+        Set<Host> ipset = new HashSet<>();
+        for (Host h : hosts.values()) {
+            if (h.ipAddresses().contains(ip)) {
+                ipset.add(h);
+            }
+        }
+        return ipset;
+    }
+
+    /**
+     * Returns the set of hosts whose location falls on the given connection point.
+     *
+     * @param connectPoint connection point
+     * @return set of hosts
+     */
+    Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+        return ImmutableSet.copyOf(locations.get(connectPoint));
+    }
+
+    /**
+     * Returns the set of hosts whose location falls on the given device.
+     *
+     * @param deviceId infrastructure device identifier
+     * @return set of hosts
+     */
+    public Set<Host> getConnectedHosts(DeviceId deviceId) {
+        Set<Host> hostset = new HashSet<>();
+        for (ConnectPoint p : locations.keySet()) {
+            if (p.deviceId().equals(deviceId)) {
+                hostset.addAll(locations.get(p));
+            }
+        }
+        return hostset;
+    }
+
+}