Tüm alıştırma soruları

A network administrator modifies the OSPFv2 router ID on an operational Cisco router by issuing the command `router-id 10.50.1.1` under `router ospf 1`. A system message informs the administrator that the change will not take effect until the OSPF process is reset. Which privileged EXEC mode command must be executed to immediately apply the new router ID?

An administrator configures port security on an enterprise access switch interface using the switchport port-security mac-address sticky command to restrict network access to authorized devices. Endpoints connect successfully and their hardware addresses are added to the active configuration as sticky entries. Following an unexpected power maintenance event, the switch reboots. When the authorized endpoints attempt to reconnect, port security violation alerts are triggered and traffic is blocked. Which administrative oversight caused this issue after the switch rebooted?

An engineer is configuring router R1 to reach the internal network $10.50.0.0/16$ using a backup path via next-hop IPv4 address $192.168.12.2$. The primary route to $10.50.0.0/16$ is currently dynamically learned via EIGRP with an administrative distance of $90$. Which command must be configured on R1 so that the static route functions as a floating static route and only enters the routing table if the primary route fails?

A network administrator inspects a Cisco IOS router configuration and observes the following line:

`username admin privilege 15 secret 9 $9$ eG8H$kQzP8xY...`

Which encryption algorithm or password type is used to secure the password for this local account?

An enterprise core router is designated to act as both an NTP client to an upstream stratum 2 server and an NTP server for internal distribution switches. To ensure reliable operations and consistent packet parameters, the network engineer must force the router to send NTP packets using a specific logical interface address and allow the router to serve as an authoritative time source if the upstream connection becomes unavailable. Which TWO Cisco IOS global configuration commands satisfy these requirements?

A network technician is tasked with securing direct physical access to a Cisco switch console. Which two configuration steps are required to ensure that users connecting through the console port are authenticated against user accounts stored in the local device database? (Select two.)

During a network maintenance window, a network engineer attempts to transfer a software image to a Cisco IOS XE switch located across an enterprise WAN link with mild latency and occasional packet loss. When using Trivial File Transfer Protocol (TFTP), the transfer repeatedly stalls and experiences severe throughput degradation whenever a single packet is dropped. However, when switching to File Transfer Protocol (FTP) over the same link, the transfer completes smoothly despite identical network conditions. Which underlying transport protocol characteristic explains why FTP recovers from packet loss far more efficiently than TFTP during file transfers?

A network administrator is troubleshooting an OSPFv2 neighbor relationship between two directly connected Cisco routers, R1 and R2. Execution of the `show ip ospf neighbor` command on R1 reveals that the adjacency state with R2 remains persistently stuck in the EXSTART state. Which configuration mismatch is the primary cause of this behavior?

A network administrator is configuring logging thresholds and destinations on a Cisco IOS device to monitor system events. Which TWO statements accurately describe Cisco IOS syslog operations and severity levels?

Two Cisco routers are connected via a point-to-point Ethernet link and are configured to form an OSPFv2 neighbor relationship. Which two parameters transmitted within the OSPF Hello packet must match between both routers for an OSPFv2 neighbor adjacency to be successfully established? (Choose two.)

A network engineer must configure router R1 with a primary static route to reach destination subnet $192.168.20.0/24$ using next-hop IPv4 address $10.1.12.2$. Additionally, a backup (floating) static route to the same destination subnet must be configured using next-hop IPv4 address $10.1.14.2$ so that it only enters the routing table if the primary path becomes unavailable. Which TWO static route configuration commands must be applied on router R1 to satisfy these requirements? (Select TWO.)

An enterprise network security team is establishing formal terminology for a security awareness program. Match each fundamental security concept on the left to its corresponding description on the right.

A network administrator is configuring a Cisco IOS router to synchronize its clock with a remote time server located at IP address 192.168.10.5. The router must operate strictly in client mode, polling time from the specified server without allowing the remote device to synchronize to the local router clock. Which global configuration command meets this requirement?

An enterprise network administrator is deploying Quality of Service (QoS) across access switch ports where desktop PCs are daisy-chained through Cisco IP Phones. Which two statements accurately describe Layer 2 and Layer 3 QoS field characteristics and trust boundary enforcement in this design?

An enterprise router is experiencing intermittent interface flaps. To capture log messages for troubleshooting, an engineer configures the commands `logging host 172.16.10.5` and `logging trap notice` in global configuration mode. Which set of syslog severity levels will the router send to the remote server?

A network administrator is configuring time synchronization on a newly installed Cisco IOS router. Arrange the following operational events in the correct chronological order, from initial CLI configuration to serving downstream clients.

A network administrator runs the `show running-config` command on a Cisco switch and observes the following user configuration entry:

`username netadmin secret 5 $1$ mER7$19f.aB3z7QkL9p0`

Which statement accurately describes the security mechanism used to store this password?

Router R3 currently populates its routing table with a primary route to the $172.16.40.0/24$ network via OSPF, which carries a default administrative distance of $110$. A network administrator wants to implement a backup path to $172.16.40.0/24$ using the next-hop IPv4 address $10.2.2.2$. The backup route must remain inactive in the routing table unless the primary OSPF path becomes unavailable. Which command should be entered on router R3 to accomplish this objective?

A network engineer inspects a Cisco router named Branch-R1 that was recently configured for OSPFv2 routing. The interface configuration and operational states on Branch-R1 are as follows:

- Loopback 0: 192.168.50.1/32 (Status: Administratively Down)
- Loopback 1: 10.10.10.1/32 (Status: Up/Up)
- GigabitEthernet 0/0: 172.16.200.1/24 (Status: Up/Up)
- GigabitEthernet 0/1: 10.200.1.1/30 (Status: Up/Up)

No manual OSPF router ID has been configured under the `router ospf 1` process. Which IP address will OSPFv2 select as the Router ID for Branch-R1 upon initialization?

Match each OSPFv2 network type or interface configuration on a Cisco router to its corresponding DR/BDR election behavior and default Hello/Dead timer settings.