Tüm alıştırma soruları

A Cisco router receives an IPv4 packet destined for host $192.168.50.45$. The router's routing table contains a static route `ip route 192.168.50.0 255.255.255.0 10.1.1.2` and a directly connected network $10.1.1.0/30$ out interface `GigabitEthernet0/1`. Arrange the sequential processing steps executed by the router to forward this packet from initial ingress lookup to egress transmission.

A network administrator needs to configure Port Address Translation (PAT) on a Cisco IOS router so that multiple internal hosts defined in Access Control List 1 can share the IP address assigned to the WAN interface GigabitEthernet0/0/1. Which command correctly completes this configuration?

A network administrator is troubleshooting an OSPFv2 adjacency issue between two routers, R1 and R2, connected via their GigabitEthernet0/0/0 interfaces. The administrator notices that the OSPF neighbor state on R1 remains persistently stuck in the EXSTART/EXCHANGE state. Interface GigabitEthernet0/0/0 on R1 has an IP MTU of 1500 bytes, while GigabitEthernet0/0/0 on R2 has been configured with an IP MTU of 1450 bytes. If modifying the interface MTU on R2 is prohibited by organizational policy, which command configured on R1 will allow the OSPF neighbor adjacency to proceed successfully to the FULL state?

An administrator must move a workstation connected to interface FastEthernet0/11 on a Cisco Catalyst switch into VLAN 40 (named MARKETING). VLAN 40 has not yet been created on the switch. Which command sequence correctly creates the VLAN with its name and configures the port as an access port in VLAN 40?

A network administrator is troubleshooting DNS name resolution in an enterprise network. A client host issues a standard DNS query to an internal recursive DNS server. However, the DNS response payload exceeds 512 bytes because the zone lookup returns a large list of resource records. How does DNS handle transport layer communication when standard UDP responses exceed this size threshold?

Match each OSPFv2 network type configuration on the left with its corresponding DR/BDR election requirement and default Hello/Dead timer characteristics on the right.

Match each IPv4 routing table entry from a Cisco IOS 'show ip route' display to its correct protocol source classification and administrative properties.

A network administrator needs to deploy Link Aggregation (LAG) on a Cisco AireOS Wireless LAN Controller (WLC) connected to an upstream Cisco Catalyst switch. Place the operational steps required to enable and establish the LAG connection in the correct sequential order from first to last.

An enterprise router learns the primary route to network $172.16.50.0/24$ via internal BGP (iBGP), which carries a default Administrative Distance of $200$. An administrator wants to configure a floating static backup route pointing to next-hop IP $10.1.1.2$. Complete the Cisco IOS command below by entering the minimum administrative distance value required to ensure this route functions strictly as a backup path.

A network administrator configures dynamic NAT on a Cisco IOS router using an IP pool named `INTERNET_POOL` ($198.51.100.1$ to $198.51.100.2$) for hosts in the $10.20.30.0/23$ internal network. During testing, users observe that after two internal hosts establish outbound connections, no other internal hosts can access external sites. The output of `show ip nat statistics` shows total translations equal to $2$ ($0$ static, $2$ dynamic, $0$ extended).

Configuration snippet:
text
ip nat pool INTERNET_POOL 198.51.100.1 198.51.100.2 netmask 255.255.255.252
access-list 15 permit 10.20.30.0 0.0.1.255
ip nat inside source list 15 pool INTERNET_POOL

Which TWO statements correctly identify the root cause of this issue and the solution required to allow all internal hosts to translate concurrently? (Select two.)

A network engineer is configuring Rapid PVST+ on a Cisco Catalyst switch. The engineer needs to set the switch priority for VLAN 45 so that the total Bridge Identifier (BID) priority field transmitted in BPDUs equals 20525. Which global configuration command must the engineer execute on the switch?

Complete the Cisco IOS command required to configure a floating static backup route.

An enterprise workstation is configured with a primary DNS server address of 10.10.20.5. The user attempts to access an external website by entering `service.partnercloud.com` into a web browser. The internal DNS server (10.10.20.5) is operational and has recursion enabled, but it currently has no cached record or authoritative zone file for `partnercloud.com`. Which statement accurately describes the name resolution role and process performed by the internal DNS server to resolve this request?

A network administrator executes the `show ip ospf interface GigabitEthernet0/1` command on router R1 connected to an enterprise Ethernet segment, yielding the following operational output:

text
GigabitEthernet0/1 is up, line protocol is up
Internet Address 10.10.10.1/24, Area 0
Process ID 1, Router ID 10.10.10.1, Network Type BROADCAST, Cost: 1
State DR, Priority 1
Designated Router (ID) 10.10.10.1, Interface address 10.10.10.1
Backup Designated Router (ID) 10.10.10.2, Interface address 10.10.10.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

If the administrator modifies the OSPF interface network type on all routers attached to this segment by executing the `ip ospf network point-to-point` command, which two operational changes will take effect on this interface? (Choose two.)

An administrator examines the following output from a Cisco router after configuring Network Address Translation to map private addresses to a defined address pool:

text
Router# show ip nat statistics
Total active translations: 1 (0 static, 1 dynamic; 0 extended)
Outside interfaces:
GigabitEthernet0/1
Inside interfaces:
GigabitEthernet0/0
Hits: 14 Misses: 0
Dynamic mappings:
-- Inside Source
[id 1] access-list 10 pool NAT_POOL refcount 1

Users on the internal subnet report that only one device at a time can successfully communicate with external networks. Which configuration change will resolve this issue and allow multiple concurrent internal hosts to share the translation pool?

An network engineer changes an Ethernet interface configuration to use the OSPFv2 Point-to-Point network type (`ip ospf network point-to-point`). Which two statements correctly describe the default operational characteristics of this OSPFv2 network type? (Select two.)

Four Cisco routers (Alpha, Beta, Gamma, and Delta) are connected to the same Ethernet broadcast domain and simultaneously boot and establish OSPFv2 adjacencies. The routers are configured with the following OSPF interface priorities and Router IDs:

- Router Alpha: Priority = 2, Router ID = 1.1.1.1
- Router Beta: Priority = 2, Router ID = 2.2.2.2
- Router Gamma: Priority = 1, Router ID = 10.10.10.10
- Router Delta: Priority = 0, Router ID = 192.168.1.1

Arrange the routers in order of their resulting OSPF roles on the shared segment, starting from the Designated Router (DR) at the top, followed by the Backup Designated Router (BDR), the eligible DROTHER router, and ending with the router completely excluded from election eligibility.

An engineer inspects the following OSPFv2 neighbor table on router R1, which is connected to a shared Layer 2 Ethernet segment:

text
R1# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/DROTHER 00:00:34 192.168.1.2 GigabitEthernet0/0
3.3.3.3 2 FULL/BDR 00:00:38 192.168.1.3 GigabitEthernet0/0
4.4.4.4 255 FULL/DR 00:00:31 192.168.1.4 GigabitEthernet0/0

Router R1's GigabitEthernet0/0 interface is configured with an OSPF priority of 10 and IP address 192.168.1.1. If the current Designated Router (R4) unexpectedly reboots, which router will be selected as the new Backup Designated Router (BDR) after OSPF reconverges?

Refer to the following partial IPv4 routing table excerpt from a Cisco router:

text
Gateway of last resort is 10.0.0.1 to network 0.0.0.0

S* 0.0.0.0/0 [1/0] via 10.0.0.1
O 10.50.16.0/20 [110/20] via 10.1.1.2, GigabitEthernet0/0
O 10.50.16.32/27 [110/30] via 10.3.3.2, GigabitEthernet0/2
D 10.50.16.32/28 [90/307200] via 10.2.2.2, GigabitEthernet0/1

The router receives two separate IPv4 unicast packets with destination IP addresses 10.50.16.45 and 10.50.16.20. Which two statements accurately describe how the router forwards these packets?

A network administrator is reviewing the layer 2 topology operational characteristics on a Cisco Catalyst switch block running Rapid PVST+. Which two statements accurately describe the port roles and operational state transitions of Rapid PVST+?