When is the default gateway address used by a host device?
A) When sending a packet to another host on the same local network.
B) When the host is booting up and requesting an IP address.
C) Only when communicating with the network switch.
D) When sending a packet to a device on a different network.
D) When sending a packet to a device on a different network.
Explanation: The text clearly states, “The default gateway is only used when the host wants to send a packet to a device on another network.” For local communication, the host uses Address Resolution Protocol (ARP) to find the local MAC address and does not need the gateway.
What is the typical IP address of a host’s default gateway?
A) The IP address of a DNS server on the internet.
B) The IP address of any other host on the local network.
C) The IP address of the router interface attached to the host’s local network.
D) The switch’s management IP address
C) The IP address of the router interface attached to the host’s local network.
Explanation: The text defines the default gateway as “generally the router interface address attached to the local network of the host.” This router interface is the “door” out of the local network
What is a key requirement for the IP address of a host and its default gateway?
A) They must be on different networks.
B) They must be in the same network.
C) The host must have a higher IP address than the gateway.
D) The gateway must be a multicast address.
B) They must be in the same network.
Explanation: The text specifies, “The IP address of the host device and the router interface address must be in the same network.” If they weren’t, the host would not be able to reach the gateway’s interface directly at Layer 2, making communication impossible.
In the example topology, a host on the 192.168.10.0 network has the IP address 192.168.10.10. What should its default gateway be?
A) 192.168.11.1
B) 192.168.10.1
C) 192.168.10.255
D) 192.168.11.255
B) 192.168.10.1
Explanation: Following the rule that the host and gateway must be on the same network, the gateway must be an address within the 192.168.10.0 network. While the specific address (e.g., .1) is an example, it would be the router’s G0/0/0 interface address in that network
In a network with multiple routers, how is the default gateway chosen?
A) All routers automatically share the default gateway role.
B) Hosts are configured with multiple gateway addresses for redundancy.
C) One router must be selected to be the default gateway router.
D) The network switch acts as the default gateway.
C) One router must be selected to be the default gateway router.
Explanation: The text addresses this scenario: “If your local network has multiple routers, you must select one of them to be the default gateway router.” This provides a single, clear path for hosts to use when sending traffic off the local network.
Why does a Layer 2 switch, which doesn’t need an IP address to forward frames, typically have an IP address configured?
A) To route traffic between different VLANs.
B) To forward frames between connected devices.
C) To allow remote administration over the IP network.
D) To perform DNS resolution for connected hosts.
C) To allow remote administration over the IP network.
Explanation: The text states that while a switch doesn’t need an IP to function as a Layer 2 device, “an IP configuration can be configured on a switch to give an administrator remote access to the switch.” This is for management purposes only.
What is the name of the logical interface on a switch that is assigned an IP address for management?
A) A Routed Port
B) A Default Gateway
C) A Switch Virtual Interface (SVI)
D) A Console Port
C) A Switch Virtual Interface (SVI)
Explanation: The text specifies that for remote management, “it must have a switch virtual interface (SVI) configured.” The SVI (often interface VLAN 1) is a logical interface that represents the switch’s management point on a VLAN.
When is a default gateway address required on a managed switch?
A) When forwarding data frames between two PCs on the same LAN.
B) When an administrator needs to manage the switch from a different network.
C) When the switch is booting up for the first time.
D) When connecting hosts to the switch’s access ports.
B) When an administrator needs to manage the switch from a different network.
Explanation: The text explains that the switch needs a default gateway “to remotely manage the switch from another network.” If the administrator’s PC is on the same local subnet as the switch’s SVI, a gateway isn’t needed, but for cross-network management, it is essential.
What is the name of the logical interface on a switch that is assigned an IP address for management?
A) A Routed Port
B) A Default Gateway
C) A Switch Virtual Interface (SVI)
D) A Console Port
C) A Switch Virtual Interface (SVI)
Explanation: The text specifies that for remote management, “it must have a switch virtual interface (SVI) configured.” The SVI (often interface VLAN 1) is a logical interface that represents the switch’s management point on a VLAN.
What is the correct global configuration command to set the default gateway on a Cisco switch?
A) ip route 0.0.0.0 0.0.0.0
B) default-gateway ip-address
C) ip default-gateway ip-address
D) interface vlan 1 followed by gateway ip-address
C) ip default-gateway ip-address
Explanation: The text provides the exact command: “To configure an IPv4 default gateway on a switch, use the ip default-gateway ip-address global configuration command.”
What IP address should be used as the default gateway for a switch?
A) The IP address of another switch on the network.
B) The IP address of a web server on the internet.
C) The IP address of the local router interface connected to the switch’s LAN.
D) The IP address of the switch’s own SVI.
C) The IP address of the local router interface connected to the switch’s LAN.
Explanation: The text clarifies that the “ip-address that is configured is the IPv4 address of the local router interface connected to the switch.” This is identical to the rule for hosts—the gateway must be on the same local network as the switch’s management IP.
