Subnets & VLANs
How large is the 802.1Q tag that is added to an Ethernet frame when using VLANs?
4 bytes
A /24 CIDR block is equivalent to a 255.255.255.0 subnet mask.
True
You are working on a Cisco switch and need to learn what VLANs exist on the switch. Which command will list the current VLANs recognized by the switch?
show vlan
IPv6 addressing does not utilize classful addressing, therefore every IPv6 address is classless.
True
When dealing with a Cisco switch, what is NOT one of the pre-established VLANs?
VLAN 1001
What command will set the native VLAN on a Juniper switch port?
set native-vlan-id
Given a host IP address of 172.16.1.154 and a subnet mask of 255.255.254.0, what is the network ID for this host?
172.16.0.0
An IP address of 192.168.18.73/28 has what network ID?
192.168.18.64
A network with a CIDR notation of /26 would have what subnet mask?
255.255.255.192
What is the maximum number of host IP addresses that can exist in a Class B network?
65,534
Network segmentation decreases both performance and security on a network.
False
A subnet of 255.255.248.0 can be represented by what CIDR notation?
/21
What is NOT one of the ways in which networks are commonly segmented?
by device manufacturer
How does a DHCP relay agent allow a centrally managed DHCP server to handle assignments for multiple subnets?
A Router, Firewall, Or Layer 3 Switch receives the DHCP request from a client in one of its local broadcast domains. The Layer 3 device creates a message of its own and routes this transmission to the specified DHCP server in a different broadcast domain DHCP server notes the relay agent's IP address and assigns the DHCP client an IP address on the same subnet
Which of the following statements regarding IPv6 subnetting is NOT accurate?
The largest IPv6 subnet capable of being created is a /64.
In order to identify the transmissions that belong to each VLAN, a switch will add a tag to Ethernet frames that identifies the port through which they arrive at the switch.
True
Network segmentation at Layer 2 of the OSI model is accomplished using VLANs.
True
You have been tasked with the creation and design of a network that must support a minimum of 5000 hosts. Which network accomplishes this goal?
10.3.0.0/19
On a Cisco switch, what would the security association identifier be for VLAN 13?
100013
A network with 10 bits remaining for the host portion will have how many usable host addresses?
1022
What IEEE standard specifies how VLAN information appears in frames and how switches interpret that information?
802.1Q
How do unmanaged switches and managed switches differ from each other?
*Unmanaged Switch - Provides plug-and-play simplicity with minimal configuration - Has no IP address assigned to it *Managed Switch: - Can be configured via a command-line interface or a web-based management GUI - Are usually assigned an IP address - VLANS can only be implemented through managed switches - Ports can be partitioned into groups
An unmanaged switch can still support the creation of VLANs, provided there is an interface for configuration.
False
