Networking Concepts

An administrator is auditing a layer 2 enterprise switch topology consisting of four switches configured with IEEE 802.1D Spanning Tree Protocol (STP). The bridge priorities and base MAC addresses for the switches are as follows:

* Switch_Alpha: Priority 32768, MAC 00:0A:B8:11:22:33
* Switch_Beta: Priority 28672, MAC 00:0A:B8:AA:BB:CC
* Switch_Gamma: Priority 28672, MAC 00:0A:B8:77:88:99
* Switch_Delta: Priority 32768, MAC 00:0A:B8:00:11:22

Which switch will be elected as the STP root bridge for this broadcast domain?

A network administrator needs to configure a firewall rule to allow secure, encrypted command-line administration of a remote Linux server using Secure Shell (SSH). Which transport protocol and port number combination must be permitted in the firewall rule?

A network administrator is designing switch port profiles and configuring advanced Virtual Local Area Network (VLAN) feature sets across enterprise switches. Match each switching concept on the left with its correct operational description on the right.

A network administrator is setting up a new office area where eight desktop workstations connect directly to a central network switch via individual twisted-pair Ethernet cables. If a single cable connecting one workstation is severed, only that workstation loses network connectivity, while all remaining computers continue to communicate normally. Which physical network topology is implemented in this office?

A network administrator is troubleshooting an enterprise client application that fails to display incoming data correctly. Packet captures reveal that while reliable transport connections are successfully established, the application cannot decode the incoming payload due to an unnegotiated character encoding scheme and an incompatible compression format. Which OSI reference model layer is directly responsible for syntax translation, data formatting, and payload encryption?

A network technician is installing a new edge router to interconnect two separate corporate subnets. At which OSI model layer do routers operate to forward packets using logical IP addressing?

An enterprise architecture team is designing a multi-tier connectivity infrastructure for a financial firm with the following requirements:

1. Inside the primary data center, high-density server racks require predictable, non-blocking east-west traffic handling with Layer 3 Equal-Cost Multi-Pathing (ECMP) routing rather than traditional Layer 2 loop-prevention protocols.
2. The link connecting the primary data center to a hot disaster recovery facility located 35 miles (56 km) away utilizes leased optical fiber spanning the metropolitan region.
3. Dynamic site-to-site VPN tunnels link 50 regional branch offices, enabling direct spoke-to-spoke encrypted communications across public internet connections on demand without hairpinning through the core data center.

Which combination of physical network topologies and network scope classifications correctly identifies the internal data center topology, the inter-site interconnect type, and the branch overlay WAN topology?

A network technician is setting up a office layout where eight client computers connect directly to a central network switch via individual Ethernet cables. If one cable breaks, only the device connected to that specific cable loses network access. Which physical network topology is implemented in this scenario?

A network engineer captures network traffic using a packet analyzer at two points along a multi-hop path: at an ingress interface of an intermediate router and directly at the destination server's network adapter. The captured traffic consists of standard TCP-based application data traversing distinct IPv4 subnets. Which of the following statements accurately describe how encapsulation and de-encapsulation operate across these processing points? (Select TWO)

A lead network architect is designing the infrastructure for a medical research center comprising six high-throughput data processing nodes located within a single campus facility. To ensure zero single points of failure during real-time genomic data synchronization, the design calls for a physical full-mesh topology across all six nodes, while offloading high-capacity storage traffic to a dedicated Storage Area Network (SAN). Which of the following statements accurately describe the operational and structural characteristics of this proposed deployment? (Select TWO.)

A network technician is organizing the core IP addressing services used within an enterprise network. Match each network service on the left with its primary operational function on the right.

An enterprise network administrator is configuring firewall rules for a newly deployed subnet containing critical infrastructure servers. The servers must synchronize their system clocks against an internal stratum 1 time authority and allow the central network management system (NMS) to regularly poll system operational metrics via Simple Network Management Protocol (SNMP). Which TWO protocol and transport layer port combinations must be permitted through the firewall to support these services?

A network security team is establishing strict edge firewall ACL rules for four specialized enterprise network services. Match each network service requirement on the left with its corresponding default transport layer protocol and destination port number on the right.

An IT technician is deploying a local network for a small office using a physical star topology where all workstation nodes connect to a central Ethernet switch. Which of the following statements correctly describe the fundamental characteristics of this topology? (Select TWO.)

An enterprise network administrator is assigned the IPv4 network block $192.168.16.0/22$ to provision subnets for a new regional office. Using Variable Length Subnet Masking (VLSM) to minimize address waste, subnets are created for the following minimum usable host requirements:

- Department A: $250$ usable host IPs
- Department B: $120$ usable host IPs
- Department C: $60$ usable host IPs
- Department D: $25$ usable host IPs

What is the total number of unallocated IP addresses (including network and broadcast addresses) remaining in the original $192.168.16.0/22$ block after these subnets are assigned?

A network technician needs to configure firewall rules to permit traffic for secure web browsing and secure remote command-line administration. Which TWO of the following protocol and default port combinations should be allowed?

Match each Layer 2 switching mechanism on the left with its corresponding operational behavior or frame processing rule on the right.

A network technician is deploying a real-time IP surveillance camera system on a local network. The video application requires immediate frame delivery for live monitoring and can tolerate minor frame loss, but cannot tolerate latency or buffering caused by frame retransmissions. Which transport layer protocol best satisfies these application requirements, and why?

A network engineer captures traffic from a client-server application and observes that after the underlying connection is established, the application exchanges control tokens to coordinate half-duplex communication rules, insert synchronization checkpoints within long data transfers, and handle reconnection dialog states following momentary dropouts. At which layer of the OSI model do these dialogue control and session maintenance functions operate?

A network switch receives an Ethernet frame on port 3 destined for a specific host. However, the destination MAC address is not currently stored in the switch's MAC address table. How will the switch handle this incoming frame?