200-125 Cisco Certified Network Associate (CCNA) Exam Set 4

Your assistant has been assigned the task of configuring one end of a WAN link between two offices. The link is a serial connection and the router on the other end is a non-Cisco router. The router in the other office has an IP address of 192.168.8.6/24. The connection will not come up, so you ask your assistant to show you the commands he configured on the Cisco router. The commands he executed are shown below. Ciscorouter(config)# interface serial0/0 Ciscorouter(config-if)# ip address 192.168.8.5 255.255.255.0 Ciscorouter(config-if)# no shut What command(s) should he run to correct the configuration?


Options are :

  • Ciscorouter(config-if)# authentication chap
  • Ciscorouter(config-if)# no ip address 192.168.8.5Ciscorouter(config-if)# ip address 192.168.8.10
  • Ciscorouter(config-if)# encapsulation ansi
  • Ciscorouter(config-if)# encapsulation ppp (Correct)

Answer : Ciscorouter(config-if)# encapsulation ppp

Given the following output, which statements can be determined to be true? (Choose three.) RouterA2# show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 192.168.23.2 1 FULL/BDR 00:00:29 10.24.4.2 FastEthernet1/0 192.168.45.2 2 FULL/BDR 00:00:24 10.1.0.5 FastEthernet0/0 192.168.85.1 1 FULL/- 00:00:33 10.6.4.10 Serial0/1 192.168.90.3 1 FULL/DR 00:00:32 10.5.5.2 FastEthernet0/1 192.168.67.3 1 FULL/DR 00:00:20 10.4.9.20 FastEthernet0/2 192.168.90.1 1 FULL/BDR 00:00:23 10.5.5.4 FastEthernet0/1 <>


Options are :

  • The DR for the serial subnet is 192.168.85.1.
  • RouterA2 is connected to more than one multi-access network. (Correct)
  • This router is neither the DR nor the BDR for the Fa0/1 subnet. (Correct)
  • The DR for the network connected to Fa0/1 has a router ID of 10.5.5.2.
  • This router is the DR for subnet 10.1.0.0.
  • The DR for the network connected to Fa0/0 has an interface priority greater than 2. (Correct)

Answer : RouterA2 is connected to more than one multi-access network. This router is neither the DR nor the BDR for the Fa0/1 subnet. The DR for the network connected to Fa0/0 has an interface priority greater than 2.

Which Internet Control Message Protocol (ICMP) message is sent by a host in the network to test connectivity with another host?


Options are :

  • ICMP time-exceeded message
  • ICMP redirect message
  • ICMP destination-unreachable message
  • ICMP echo-request message (Correct)

Answer : ICMP echo-request message

You are the senior network administrator for a large corporation. Some new trainees have recently joined the network security team. You are educating them about denial-of-service (DoS) attacks and the risks posed to a network by such attacks. Which three are risks that a DoS attack poses to a network? (Choose three.)


Options are :

  • Spread of spyware
  • Downtime and productivity loss (Correct)
  • Revenue loss (Correct)
  • Spread of viruses
  • Information theft (Correct)

Answer : Downtime and productivity loss Revenue loss Information theft

What Cisco IOS command produced the following as a part of its output? Port Security: Enabled Port status: SecureUp Violation mode: Shutdown Maximum MAC Addresses: 2 Total MAC Addresses: 2 Configured MAC Addresses: 2 Aging Time: 30 mins Aging Type: Inactivity SecureStatic address aging: Enabled Security Violation count: 0


Options are :

  • show interfaces port-security
  • show port-security interface (Correct)
  • show interfaces switchport
  • show ip interface

Answer : show port-security interface

You are the network administrator for your company. You want to use both IPv6 and IPv4 applications in the network. You also want to ensure that routers can route both IPv6 and IPv4 packets. Which deployment model should be implemented to accomplish the task?


Options are :

  • Dual-Stack Backbones (Correct)
  • IPv6 over dedicated Wide Area Network (WAN) links
  • .IPv6 over IPv4 tunnels
  • Protocol translation

Answer : Dual-Stack Backbones

Which command is used on a Catalyst 2950 series switch to enable basic port security on the interface?


Options are :

  • set port-security
  • switchport port-security enable
  • switchport port-security (Correct)
  • set port-security enable

Answer : switchport port-security

Which Cisco command will display the version and configuration data for Secure Shell (SSH)?


Options are :

  • debug ssh
  • show ip ssh (Correct)
  • debug ip ssh
  • show ssh

Answer : show ip ssh

Which of the following TCP port numbers is used by Simple Mail Transfer Protocol (SMTP)?


Options are :

  • 80
  • 25 (Correct)
  • 53
  • 21
  • 57
  • 23

Answer : 25

Which of the following methods of tunneling Internet Protocol version 6 (IPv6) traffic through an IPv4 network increases protocol overhead because of IPv6 headers?


Options are :

  • IPv6 over IPv4 tunnels (Correct)
  • Protocol translation
  • Dual-Stack Backbones
  • IPv6 over dedicated WAN links

Answer : IPv6 over IPv4 tunnels

Which is the valid IP address range that can be assigned to hosts on the subnet that includes the address 172.16.4.6/23?


Options are :

  • 172.16.2.1 - 172.16.4.254
  • 172.16.3.1 - 172.16.5.254
  • 172.16.4.1 - 172.16.5.254 (Correct)
  • 172.16.4.1 - 172.16.4.254

Answer : 172.16.4.1 - 172.16.5.254

Which VLAN can NOT be filtered through the VLAN Trunking Protocol (VTP) Pruning feature of Cisco switches?


Options are :

  • VLAN 10
  • VLAN 1 (Correct)
  • VLAN 1000
  • VLAN 100

Answer : VLAN 1

Which type of switching process requires a switch to wait for the entire frame to be received before forwarding it to a destination port?


Options are :

  • store and forward (Correct)
  • cut-through
  • fragment free
  • frame-forward

Answer : store and forward

Which of the following statements is NOT true of Cisco ACI?


Options are :

  • It is a comprehensive SDN architecture.
  • It provides policy driven automation support.
  • It uses Cisco APIC as the central management system
  • It decreases network visibility (Correct)

Answer : It decreases network visibility

Which of the following are NOT valid IPv6 addresses? (Choose all that apply.)


Options are :

  • ::FFFF:10.2.4.1
  • fe80:2030:31:24 (Correct)
  • 2001:0:42:3:ff::1
  • ::
  • 225.1.4.2 (Correct)

Answer : fe80:2030:31:24 225.1.4.2

Which of the following commands helps you determine the Layer 1 and Layer 2 up/down status of a Cisco interface?


Options are :

  • show interfaces (Correct)
  • show controllers
  • show running-config
  • show interfaces trunk

Answer : show interfaces

You are the network administrator for your company. Your company has opened a new site in London. The Chief Technical Officer (CTO) of the company wants to implement a routing protocol that can provide the following features: Supports multiple large networks Does not require a hierarchical physical topology Supports VLSM Provides loop prevention and fast convergence Provides load balancing over un-equal cost links Which routing protocol should be implemented in the new site?


Options are :

  • Enhanced Interior Gateway Routing Protocol (EIGRP) (Correct)
  • Routing Information Protocol version 2 (RIPv2)
  • Interior Gateway Routing Protocol (IGRP)
  • Open Shortest Path First (OSPF)

Answer : Enhanced Interior Gateway Routing Protocol (EIGRP)

Which of the following are Wide Area Network (WAN) protocols? (Choose three.)


Options are :

  • WEP
  • AAA
  • PPP (Correct)
  • HDLC (Correct)
  • STP
  • Frame Relay (Correct)

Answer : PPP HDLC Frame Relay

You have two routers in your OSPF area 0. Router 1 is connected to Router 2 via its Serial 1 interface, and to your ISP via the Serial 0 interface. Router 1 is an ASBR. After your assistant configures a default route on Router 1, you discover that whenever either router receives packets destined for networks that are not in the routing tables, it causes traffic loops between the two routers. To troubleshoot, you execute the show run command on Router 1. Part of the output is shown below: IP route 0.0.0.0 0.0.0.0 serial 1 Router ospf 1 Network 192.168.5.0 0.0.0.255 area 0 Default-information originate Which command or set of commands should you execute on Router 1 to stop the looping traffic while maintaining Router 2's ability to send traffic to the Internet?


Options are :

  • Execute the no network 192.168.5.0 area 0 command and then execute the network 192.168.5.0 255.255.255.0 area 0 command.
  • Execute the no default-information originate command.
  • Execute the default-information originate always command.
  • Execute the no ip route 0.0.0.0 0.0.0.0 serial 1 command and then execute the ip route 0.0.0.0 0.0.0.0 serial 0 command. (Correct)

Answer : Execute the no ip route 0.0.0.0 0.0.0.0 serial 1 command and then execute the ip route 0.0.0.0 0.0.0.0 serial 0 command.

What is the possible IP range that can be assigned to hosts on a subnet that includes the address 192.168.144.34/29?


Options are :

  • 192.168.144.28 - 192.168.144.40
  • 192.168.144.32 - 192.168.144.63
  • 192.168.144.33 - 192.168.144.38 (Correct)
  • 192.168.144.33 - 192.168.144.48

Answer : 192.168.144.33 - 192.168.144.38

The conference room has a switch port available for use by the presenter during classes. You would like to prevent that port from hosting a hub or switch. Which of the following commands could be used to prevent that port from hosting a hub or switch?


Options are :

  • switchport port-security mac address sticky
  • switchport port-security mac address
  • switchport port-security maximum
  • switchport port-security (Correct)

Answer : switchport port-security

Which two features do Cisco routers offer to mitigate distributed denial-of-service (DDoS) attacks? (Choose two.)


Options are :

  • Flow control
  • Anti-DDoS guard
  • Access control lists (ACLs) (Correct)
  • Scatter tracing
  • Rate limiting (Correct)

Answer : Access control lists (ACLs) Rate limiting

Which statement is supported by the following output? router# show ip protocols Routing Protocol is "eigrp 3" Sending updates every 90 seconds, next due in 24 seconds <> EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 EIGRP maximum hopcount 100 EIGRP maximum metric variance 1 Redistributing: eigrp 3 Automatic network summarization is not in effect Maximum path: 4 Routing for Networks: 172.160.72.0 192.168.14.0 <>


Options are :

  • EIGRP supports load-balancing over four equal-cost paths (Correct)
  • EIGRP supports load-balancing over three equal-cost paths
  • EIGRP supports load-balancing over four unequal-cost paths
  • EIGRP supports load-balancing over three unequal-cost paths

Answer : EIGRP supports load-balancing over four equal-cost paths

In which of the following IPv6 address assignment methods will the interface receive its IPv6 address from a process native to IPv6, and receive additional parameters from DHCP?


Options are :

  • DHCPv6-PD
  • Stateful DHCPv6
  • Stateless autoconfiguration
  • Stateless DHCPv6 (Correct)

Answer : Stateless DHCPv6

You are configuring a serial link between a Cisco router and a router produced by another vendor. What would be the advantages of using Point to Point Protocol (PPP) over High Level Data Link Control (HDLC) in this scenario?


Options are :

  • PPP performs error checking.
  • HDLC is not available on non-Cisco routers.
  • PPP is faster.
  • HDLC has a proprietary "type" field that may be incompatible with equipment from other vendors. (Correct)

Answer : HDLC has a proprietary "type" field that may be incompatible with equipment from other vendors.

Which of the following are classless routing protocols? (Choose four.)


Options are :

  • Enhanced Interior Gateway Routing Protocol (EIGRP) (Correct)
  • Border Gateway Protocol (BGP) (Correct)
  • Routing Information Protocol version 2 (RIPv2) (Correct)
  • Open Shortest Path First (OSPF) (Correct)
  • Routing Information Protocol version 1 (RIPv1)
  • Interior Gateway Routing Protocol (IGRP)

Answer : Enhanced Interior Gateway Routing Protocol (EIGRP) Border Gateway Protocol (BGP) Routing Information Protocol version 2 (RIPv2) Open Shortest Path First (OSPF)

You are the network administrator for your company and have configured Cisco Discovery Protocol (CDP) in your network. You recently noticed that when devices send large numbers of CDP neighbor announcements, some devices are crashing. You decide to disable CDP on the router. Which command should you use to achieve the objective?


Options are :

  • no cdp advertise-v2
  • no cdp enable
  • no cdp run (Correct)
  • set cdp disable

Answer : no cdp run

Which type of Dynamic Host Configuration Protocol (DHCP) transmission is used by a host to forward a DHCPDISCOVER packet to locate a DHCP server on the network?


Options are :

  • multicast
  • broadcast (Correct)
  • anycast
  • unicast

Answer : broadcast

You are working with an Internet Service Provider (ISP) as network manager. A corporate client approaches you to lease a public IP subnet that can accommodate 250 users. You have assigned him the 192.25.27.0 subnet. What subnet mask should be assigned to this IP address so that it can accommodate the number of users required by the corporate client?


Options are :

  • 255.255.255.224
  • 255.255.255.0 (Correct)
  • 255.255.255.128
  • 255.255.255.252

Answer : 255.255.255.0

Which WAN switching technology is used with ISDN?


Options are :

  • circuit switching (Correct)
  • cell switching
  • packet switching
  • virtual switching

Answer : circuit switching

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