Tüm alıştırma soruları

A network administrator configures the interface command `ip ospf priority 0` on a router's GigabitEthernet interface connected to a broadcast multiaccess Ethernet network. What is the effect of setting the OSPF priority to 0 on this interface?

Four Cisco routers (R1, R2, R3, and R4) are booted simultaneously on a shared broadcast multiaccess Ethernet segment running OSPFv2 in Area 0. No explicit OSPF router ID is configured under the `router ospf` process on any router.

The interface and active IP configurations are as follows:
- R1: GigabitEthernet0/0 IP $192.168.1.1/24$, Priority = $10$; Loopback0 IP = $10.1.1.1/32$
- R2: GigabitEthernet0/0 IP $192.168.1.2/24$, Priority = $0$; Loopback0 IP = $172.16.1.1/32$
- R3: GigabitEthernet0/0 IP $192.168.1.3/24$, Priority = $10$; Loopback0 IP = $10.2.2.2/32$
- R4: GigabitEthernet0/0 IP $192.168.1.4/24$, Priority = $20$; Loopback0 IP = $10.0.0.1/32$

Order the routers in sequence from highest to lowest precedence during the initial Designated Router (DR) and Backup Designated Router (BDR) election, starting with the router selected as DR down to the completely ineligible router.

An enterprise deploys a Cisco Lightweight Access Point (LAP) operating in FlexConnect mode at a remote branch office. The AP is configured to perform local switching for WLANs mapped to VLAN 10 (Sales) and VLAN 20 (Guests). The AP management traffic must be assigned to VLAN 100 and transmitted untagged over the physical link. The connected Cisco Catalyst switch port is configured as an 802.1Q trunk. Which switchport configuration command must be applied to the switch port to ensure AP management traffic and locally switched WLAN traffic function properly?

A network administrator configures dynamic NAT on a Cisco IOS router to enable hosts on the $192.168.10.0/24$ internal network to reach the Internet using an address pool defined as $203.0.113.1$ to $203.0.113.2$. After deployment, only two internal hosts can access external servers at any given time. Subsequent connection attempts from other internal hosts fail until one of the active hosts disconnects. Verification with the command `show ip nat translations` shows exactly two active entries without any transport layer port numbers listed. Which configuration change must be made on the router to allow all internal hosts to access external resources simultaneously?

A Cisco router contains the following partial output in its IPv4 routing table:

text
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 4 subnets, 3 masks
O 10.88.0.0/16 [110/20] via 192.168.1.1, 00:14:22, GigabitEthernet0/0/0
D 10.88.12.0/22 [90/30720] via 192.168.2.1, 01:45:10, GigabitEthernet0/0/1
S 10.88.14.0/24 [1/0] via 192.168.3.1, 04:12:00, GigabitEthernet0/0/2
O 10.88.14.32/28 [110/65] via 192.168.4.1, 00:05:30, GigabitEthernet0/0/3

When the router receives a packet with the destination IP address 10.88.14.45, which next-hop IP address and outgoing interface will it use to forward the packet?

A network administrator is connecting a new IP security camera to interface GigabitEthernet1/0/4 on a Cisco Catalyst switch. VLAN 22 (named CAMERAS) has already been created in global configuration mode. Which set of interface configuration commands correctly configures GigabitEthernet1/0/4 to operate as a static, untagged access port belonging to VLAN 22?

A network administrator must configure a static route on router R1 to reach the destination subnet $2001:\text{db8}:\text{acad}:10::/64$. The administrator intends to use the link-local address $\text{fe80}::2:1$ of the adjacent router as the next hop via R1's local exit interface GigabitEthernet0/0/1. Which Cisco IOS command accurately achieves this configuration?

A network engineer is provisioning static IP addresses for servers assigned to the subnetwork block $10.45.192.0/21$. Which TWO of the following IPv4 addresses are valid, usable host addresses within this subnetwork?

A network engineer is troubleshooting an OSPFv2 neighbor relationship between two routers, R1 and R2, connected via a direct GigabitEthernet0/0 interface. R1's interface is configured with an MTU of 1500 bytes. When issuing the command `show ip ospf interface gigabitethernet0/0` on R2, the engineer observes the following truncated output:

GigabitEthernet0/0 is up, line protocol is up
Internet Address 10.0.12.2/24, Area 0
Process ID 1, Router ID 10.0.12.2, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
IP MTU bytes 1400

When running `show ip ospf neighbor` on R1, the neighbor status for R2 is listed as `EXSTART/ -`. Which statement correctly identifies the root cause of this stuck neighbor state and the appropriate command to bypass this requirement on R2?

During a scheduled maintenance window, a network specialist examines the OSPFv2 operational status of interface GigabitEthernet0/1 on router R3 using the Cisco IOS CLI:

text
GigabitEthernet0/1 is up, line protocol is up
Internet Address 10.1.1.3/24, Area 0
Process ID 1, Router ID 192.168.100.1, Network Type BROADCAST, Cost: 1
State DROTHER, Priority 0
Designated Router (ID) 10.1.1.1, Interface address 10.1.1.1
Backup Designated Router (ID) 10.1.1.2, Interface address 10.1.1.2

If both the current Designated Router (10.1.1.1) and Backup Designated Router (10.1.1.2) suffer a simultaneous power failure, which role will router R3 assume on this multiaccess segment after the network re-converges?

During network troubleshooting on router R3, users on subnet $172.16.10.0/24$ report that only one internal host can access the Internet at a time. The network administrator runs `show ip nat statistics` and observes the following output:

Total active translations: 1 (0 static, 1 dynamic, 0 extended)
Outside interfaces:
GigabitEthernet0/1
Inside interfaces:
GigabitEthernet0/0
Hits: 142 Misses: 18
Dynamic mappings:
-- Inside Source
access-list 15 pool CORP_PAT refcount 1

The running configuration contains:
`ip nat pool CORP_PAT 203.0.113.10 203.0.113.10 prefix-length 29`
`ip nat inside source list 15 pool CORP_PAT`

Which configuration change on R3 will resolve the issue and permit multiple internal hosts to access external resources simultaneously?

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

text
Codes: C - connected, S - static, D - EIGRP, O - OSPF

Gateway of last resort is 10.88.0.1 to network 0.0.0.0

S* 0.0.0.0/0 [1/0] via 10.88.0.1
O 10.88.0.0/16 [110/20] via 10.88.1.1, GigabitEthernet0/0/1
D 10.88.15.0/24 [90/307200] via 10.88.2.1, GigabitEthernet0/0/2
O 10.88.15.192/27 [110/50] via 10.88.3.1, GigabitEthernet0/0/3

The router receives a unicast IPv4 packet addressed to destination host 10.88.15.200. Which next-hop IP address will the router use to forward this packet?

An enterprise edge router R1 connects to two distinct Internet Service Providers via Ethernet interfaces. The network team requires primary outbound traffic to traverse ISP-1 via next-hop IPv4 address $203.0.113.1/30$ on interface GigabitEthernet0/0/1. A backup path must traverse ISP-2 via next-hop IPv4 address $198.51.100.1/30$ on interface GigabitEthernet0/0/2, taking effect only if the primary route fails.

Which two configuration statements or operational characteristics are correct for implementing this routing strategy?

To enable multiple internal devices to share the single public IPv4 address assigned to WAN interface Serial0/1/0 using Port Address Translation (PAT), which Cisco IOS command must be executed?

A network administrator enables OSPFv2 on router R3 without manually configuring an OSPF router ID. The router has the following operational interfaces:

- Loopback0: $10.0.0.1/32$
- Loopback1: $172.16.1.1/32$
- GigabitEthernet0/0: $192.168.10.1/24$
- GigabitEthernet0/1: $192.168.20.1/24$

What IPv4 address will OSPFv2 select as the router ID for router R3?

A network engineer needs to configure static Port Address Translation (Port Forwarding) on a Cisco IOS router to allow public users on the Internet to access an internal HTTP web server. The internal web server is assigned private IPv4 address $10.1.1.50$ and listens on TCP port $80$. External connections should be directed to the router's public IPv4 address $203.0.113.10$ on TCP port $8080$.

What exact Cisco IOS global configuration command must be entered to establish this static NAT mapping?

A network administrator executes the command `ip route 10.50.1.0 255.255.255.0 172.16.1.2 120` on a Cisco IOS router. What does the numeric value `120` at the end of this command represent?

An administrator inspects the IPv4 routing table on a Cisco router and observes the following partial output:

text
Codes: C - connected, S - static, D - EIGRP, O - OSPF, B - BGP

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 4 subnets, 4 masks
O 10.200.0.0/16 [110/50] via 172.16.1.1, 00:24:12, GigabitEthernet0/1
D 10.200.64.0/18 [90/2172416] via 172.16.2.1, 02:15:04, GigabitEthernet0/2
S 10.200.64.0/24 [120/0] via 172.16.3.1, GigabitEthernet0/3
B 10.200.64.0/20 [20/100] via 172.16.4.1, 05:10:20, GigabitEthernet0/4

Which two statements accurately describe how the router will forward packets based on these routing table components? (Select two.)

Arrange the criteria used by OSPFv2 to determine Designated Router (DR) election precedence in order from highest precedence (evaluated first) to lowest precedence (evaluated last).

A network administrator is verifying traffic flows from client workstations in an enterprise environment. Which transport layer protocol and destination port does a host client use by default when submitting standard domain name lookup queries to a DNS server?