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Question 1:
Which two sentences are true about a prefix as a component of the routing table? (Choose two.)
A. The prefix refers to the subnet ID.
B. The prefix length for 255.255.0.0 is /16.
C. A default route is configured with a prefix length of /24.
D. A prefix length of /32 is used for static host routes.
Answer: A and D
Explanation:
The prefix refers to the subnet ID: A prefix, also known as a network prefix, is a portion of an IP address that identifies the network or subnet to which it belongs. In a routing table, the prefix is used to determine the destination network for packets.
A prefix length of /32 is used for static host routes: A static host route is a route that is manually configured in a routing table to specify the next hop for packets destined to a specific host. A prefix length of /32 is used for static host routes because it represents a single IP address, which is the address of the host.
The other statements are not true:
The prefix length for 255.255.0.0 is /16: The prefix length for 255.255.0.0 is actually /16. A prefix length of /16 indicates that the first 16 bits of the IP address are used to identify the network, and the remaining 16 bits are used to identify the host within the network.
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A default route is configured with a prefix length of /24: A default route is a route that is used to send packets to destinations that are not explicitly specified in the routing table. A default route typically has a prefix length of /0, which indicates that it matches any destination IP address.
Question 2:
Which command creates a floating static route?
A. ip route 172.16.4.0 255.255.255.0 172.16.7.2 150
B. ip route 172.16.4.0 255.255.255.255 172.16.7.2
C. ip route 172.16.4.0 255.255.255.0 172.16.7.2
D. ip 172.16.4.0 255.255.255.0 172.16.7.2 140
Answer: A
Explanation:
Correct answer: ip route 172.16.4.0 255.255.255.0 172.16.7.2 150
A floating static route assigns an administrative distance to a route so that a static route is not always preferred over a dynamic route. The administrative distance is added as a parameter at the end of the “ip route“ command.
Question 3:
What are two valid values for AD in a routing table? (Choose two.)
A. /24
B. 10.0.0.0
C. 512
D. 110
Answer: A and D
Explanation:
In a routing table, AD stands for Administrative Distance. It’s a numerical value that routers use to select the best path when there are multiple routes to the same destination. Lower AD values indicate more preferred routes.
Therefore, the two valid values from your list are:
110: This is a common AD value, often associated with routing protocols like OSPF.
/24: This represents the network prefix, which is used to define the subnet mask. While it is related to routing, it is not an Administrative Distance value.
Here’s why the others are not:
10.0.0.0: This is an IP address, which is used to identify network devices.
512: While it is a number, it is not a typically used AD value.
Question 4:
Which STP interface state does not forward frames as it removes unused MAC table entries?
A. Forwarding
B. Blocking
C. Listening
D. Learning
Answer: C
Explanation:
Correct answer: Listening
When a switch that is blocking needs to switch to a forwarding state, it goes through the listening and then learning states. The listening state does not forward, and purges old MAC table entries.
The learning state does not allow for forwarding frames, and has the interface learning MAC addresses. The blocking state does not forward frames. The forwarding state is when an interface can forward normally.
Question 5:
A network topology has three connected switches (SW1, SW2, SW3). A host on SW1 connects to a host on SW2 through the link between SW1 and SW2. If the link between SW1 and SW2 fails, which process describes how STP handles the situation?
A. Forward secrecy
B. Convergence
C. Discovery
D. Multiarea
E. Flooding
Answer: B
Explanation:
Correct answer: Convergence
When something has changed in the network topology, switches can react by changing which ports block and which ports forward through a process termed STP convergence.
Discovery can relate to how hosts find each other on a network. Flooding involves packets being sent on every interface except the originating one. Multiarea refers to when a large OSPF is divided into smaller areas. Forward secrecy refers to encryption that changes keys regularly during a conversation.
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Question 6:
Which WLC controller port type is used to carry management traffic to APs?
A. Service port
B. Redundancy port
C. Distribution system port
D. Console port
Answer: C
Explanation:
Correct answer: Distribution system port
Distribution system ports carry data to and from the wireless LAN controller (WLC) to access points (APs), including management traffic such as SSH and SNMP.
A service port does out-of-band management, system recovery, and initial boot functions. A console port is a physical connection that gives a terminal connection. A redundancy port is used to connect to peer controllers for high availability.
Question 7:
What is used to connect VLANs between switches?
A. Trunking
B. Anycasting
C. Multicasting
D. Routing
E. Flooding
Answer: A
Explanation:
Correct answer: Trunking
Trunking is used to connect VLANs across switches. It uses a process called tagging that adds another header to frames with a VLAN ID field.
Flooding is when a frame is sent out of each port. Multicasting is sending data to multiple addresses. Anycasting is when multiple servers share the same address. Routing is used at Layer 3, while trunking is Layer 2.
Question 8:
An administrator configures an interface to be an access port on a VLAN with an ID of 10. They want this interface to ignore DTP negotiations because it will only ever act as an access interface. What command should they run to specify this?
A. name 10
B. switchport trunk native vlan 10
C. switchport mode access
D. switchport trunk allowed vlan 10
E. switchport access vlan 10
Answer: C
Explanation:
Correct answer: switchport mode access
The “switchport mode access“ command tells the switch to always use the port as an access interface. That will prevent the Dynamic Trunking Protocol (DTP) from affecting it.
The “switchport access vlan 10“ command sets an interface to vlan 10. The “name vlan-10“ command sets the name of the VLAN to vlan-10. The “switchport trunk native vlan 10“ command defines the native VLAN for a trunk port. The “switchport trunk allowed vlan 10“ defines a list of allowed VLANs on a trunk.
Question 9:
Which prefix length is used for a host route?
A. /8
B. Zero
C. /16
D. /32
E. /24
Answer: D
Explanation:
Correct answer: /32
A host route is a route that goes to a specific IP address. It has a prefix length of /32, which is equal to a subnet mask of 255.255.255.255.
Question 10:
In the output of the “show ip route“ command, which information comes after the term “via“?
A. Prefix
B. Metric
C. Prefix length
D. Next-hop router
E. Timer
Answer: D
Explanation:
Correct answer: Next-hop router
In the output of the “show ip route“ command, the next-hop router comes after the words “via“.
The prefix comes after the protocol code. The prefix length comes after the prefix. The metric comes after the administrative distance. The timer comes after the next-hop router.
For a full set of 1140 questions. Go to
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SkillCertPro offers detailed explanations to each question which helps to understand the concepts better.
It is recommended to score above 85% in SkillCertPro exams before attempting a real exam.
SkillCertPro updates exam questions every 2 weeks.
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