An engineer recently installed a new distribution switch and connected two servers provisioned with the following IPs: 192.168.17.20 and 192.168.17.30. The servers cannot connect to the Internet, but they can reach themselves. The engineer observes that the distribution switch has the following setup:
The engineer is able to reach the core router 192.168.17.1 from the distribution switch. Which of the following is the most likely cause of this issue?
The servers can communicate with each other but not the internet, indicating local network connectivity is fine. The distribution switch's VLAN and IP configuration are correct, and the engineer can reach the core router, suggesting the issue is not with the switch or the router. The most likely cause is that the servers do not have a default gateway configured, which is necessary for traffic to leave the local network and reach the internet.
A! which of the following layers of the OSI model can switches operate? (Select two).
Switches operate atLayer 2andLayer 3of the OSI model. Here's a brief explanation for each layer:
Layer 2 (Data Link Layer):
Switches primarily operate at this layer.
They use MAC addresses to forward frames within a local network (LAN).
Switches create and maintain MAC address tables to make forwarding decisions.
Examples of switches include Ethernet switches and VLAN switches.
Layer 3 (Network Layer):
Some advanced switches (known asLayer 3 switches) can perform routing functions.
Layer 3 switches can route traffic between different subnets within the same LAN.
They use IP addresses to make routing decisions.
Layer 3 switches combine the features of switches and routers.
Which of the following fields are negotiated during the three-way-handshake process? (Select three).
During the TCP three-way handshake process, the following fields are negotiated:
A . Sequence number: Initial sequence numbers are established during the handshake to keep track of the segments in the communication.
C . Window size: This determines the amount of data that can be sent before receiving an acknowledgment.
G . Acknowledgment number: This confirms receipt of the data and also indicates the next expected byte.
The other options are not negotiated during the three-way handshake:
B . MTU (Maximum Transmission Unit): This is determined at the network layer and is not negotiated during the handshake.
D . MSS (Maximum Segment Size): This is communicated during the handshake but not negotiated; it's declared by the sender to inform the receiver of the maximum segment size it can handle.
E . TTL (Time To Live): This is set in each IP packet to limit its lifespan and is not negotiated during the handshake.
F- Flags: Specific flags are used during the handshake (SYN and ACK), but they are not ''negotiated'' per se.
H) CRC (Cyclic Redundancy Check): This is used for error-checking in frames at the data link layer and is not part of the three-way handshake.
An organization needs a solution that will inspect network traffic, determine security threats using signature-based rules, and block the traffic in real time based on the security assessment. Which of the following network devices will support these requirements?
An Intrusion Prevention System (IPS) is designed to inspect network traffic, identify malicious activity using signature-based rules, and block potentially harmful traffic in real time. This aligns with the requirements stated in the question.
Which of the following describes the differences between switches and hubs?
Switches operate at the data link layer (Layer 2) of the OSI model and make decisions based on MAC addresses. Hubs, on the other hand, operate at the physical layer (Layer 1) and simply repeat the signals they receive to all connected devices without any filtering or decision-making.
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