Networking Concepts

An enterprise router receives two dynamic route updates for the destination network 172.16.40.0/24. The first update is received from OSPF with a metric cost of 45. The second update is received from RIPv2 with a hop count metric of 2. Default administrative distance values are configured across all protocols on the router. Which path will be installed into the active IP routing table?

A network administrator is provisioning a dedicated IPv4 subnet for a smart building automation system that requires static IP addresses for $58$ environmental sensors. To conserve address space, which of the following CIDR prefix lengths represents the smallest subnet that accommodates this requirement?

A network engineer is evaluating dynamic routing protocols for an enterprise network expansion. The requirement is to implement a protocol that maintains a detailed topology map of the network and converges quickly upon topology changes. Which of the following statements accurately describe operational characteristics of Link-State dynamic routing protocols? (Select TWO)

An enterprise network engineer is provisioning an isolated management subnet using the IPv4 block $10.150.80.0/23$. Out of the total usable host IP addresses in this subnet, $5$ IP addresses are statically reserved for gateway redundancy protocols and infrastructure monitoring agents. How many usable host IP addresses remain available for assignment to endpoint workstations in this subnet?

A network engineer is configuring an interface on a gateway router for an isolated security camera subnet with the network IP address block $192.168.88.192/27$. What is the last usable host IP address that can be assigned to a device on this subnet?

A network administrator is inspecting a packet capture file on a host receiving an automated file transfer. As the destination host de-encapsulates the incoming data unit from the physical network interface up to the application process, the protocol stack must inspect specific header fields to identify which higher-layer protocol or service should receive the payload next. Which of the following correctly identifies the sequential order of header fields evaluated at Layer 2, Layer 3, and Layer 4 to route the payload to the correct application process?

An enterprise layer 3 switch receives an IP packet destined for $10.20.30.45$. The active routing table contains three matching entries for this destination:

- Static route to $10.20.30.0/24$ (Administrative Distance: $1$)
- OSPF route to $10.20.30.32/28$ (Administrative Distance: $110$)
- BGP route to $10.0.0.0/8$ (Administrative Distance: $20$)

Which route will the switch select to forward the packet?

A network engineer is dividing the enterprise IPv4 address block $10.45.0.0/21$ into equal-sized subnets using a prefix mask of $/26$. What is the total number of usable host IP addresses available across all of the newly created $/26$ subnets?

A network administrator is categorizing dynamic routing protocols based on administrative distance and metric calculations for an enterprise baseline audit. Match each dynamic routing protocol on the left with its corresponding default administrative distance and primary metric characteristics on the right.

A network engineer is configuring access control lists on a core switch that routes traffic between an enterprise client VLAN and a server subnet hosting central network services. Endpoints on the client VLAN rely on a local DHCP relay agent embedded in their default gateway to receive IP assignments from the central DHCP server. Which of the following port and transport protocol combinations must be permitted to allow full bidirectional DHCP relay and client-server operation? (Select TWO.)

A network engineer is allocated the IPv4 block $198.51.100.0/24$ and needs to provision subnets for departmental networks. Each departmental network must support a minimum of $25$ usable host IP addresses. Using the longest prefix length (smallest subnet size) that satisfies this host requirement, what is the maximum number of usable host IP addresses available on each generated subnet?

A network administrator is provisioning a dedicated IPv4 subnet for a store's point-of-sale terminals using the network address block $172.16.100.0/22$. Which of the following represents the first usable host IP address within this subnet?

A network architect is evaluating dynamic routing protocol behaviors for an enterprise network expansion. Which of the following statements accurately contrast the operational characteristics and algorithms of link-state routing protocols with distance-vector routing protocols? (Select TWO.)

A network operations team is configuring intermediate Access Control Lists (ACLs) to allow perimeter routers to send standardized event logs to a central SIEM server located in the management VLAN. If the infrastructure relies on standard unencrypted log forwarding, which transport protocol and destination port combination must be allowed through the ACLs?

A network administrator is allocated the IPv4 address block $10.75.12.0/23$ to provision subnets for remote branch kiosks. Each kiosk requires a subnetwork capable of supporting at least $28$ usable host IP addresses. What is the maximum number of equal-sized subnets meeting this host requirement that can be created from the allocated address block?

A network administrator is setting up a network management system (NMS) to poll status and performance metrics from managed routers and switches across an internal firewall. Which port and transport layer protocol combination must be permitted on the firewall to allow the NMS to issue these polling requests to the managed devices?

A systems administrator is configuring perimeter firewall access control rules to enable centralized administrative access across enterprise infrastructure. The security baseline requires deploying TACACS+ for AAA management of network switches and Remote Desktop Protocol (RDP) for graphical management of remote Windows servers. Which of the following port and transport layer protocol combinations must be permitted through the firewall to support these services? (Select TWO)

A network administrator is dividing the IP address block $172.20.0.0/23$ into subnets with a prefix length of $/26$ to accommodate multiple department networks. What is the broadcast address of the third subnet in this allocation?