CCNA 2 Final Exam Answers
What is the effect of issuing the passive-interface default command on a router that is configured for OSPF?
It prevents OSPF messages from being sent out any OSPF-enabled interface.*
What are two features of a link-state routing protocol?
Routers send triggered updates in response to a change. Routers create a topology of the network by using information from other routers.
Which command will enable auto-MDIX on a device?
S1(config-if)# mdix auto *
The OSPF Type 1 packet is the _________ packet.
hello
What is the OSPF cost to reach the R2 LAN 172.16.2.0/24 from R1?
74
Which problem is evident if the show ip interface command shows that the interface is down and the line protocol is down?
A cable has not been attached to the port.
Which statement describes a route that has been learned dynamically?
It is automatically updated and maintained by routing protocols.
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. What is the problem preventing PC0 and PC1 from communicating with PC2 and PC3?
The serial interfaces of the routers are in different subnets.
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?
native VLAN ID
Which switching method drops frames that fail the FCS check?
store-and-forward switching
Two employees in the Sales department work different shifts with their laptop computers and share the same Ethernet port in the office. Which set of commands would allow only these two laptops to use the Ethernet port and create violation log entry without shutting down the port if a violation occurs?
switchport mode access switchport port-security switchport port-security maximum 2 switchport port-security mac-address sticky switchport port-security violation restrict
Which three pieces of information does a link-state routing protocol use initially as link-state information for locally connected links? (Choose three.)
the cost of that link the type of network link the link router interface IP address and subnet mask
How is the router ID for an OSPFv3 router determined?
the highest IPv4 address on an active interface
Refer to the exhibit. An ACL preventing FTP and HTTP access to the interval web server from all teaching assistants has been implemented in the Board Office. The address of the web server is 172.20.1.100 and all teaching assistants are assigned addresses in the 172.21.1.0/24 network. After implement the ACL, access to all servers is denied. What is the problem?
**named ACLs requite the use of port numbers**
The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which two commands are needed at a minimum to apply an ACL that will ensure that only devices that are used by the network administrators will be allowed Telnet access to the routers? (Choose two.)
-access-list 5 permit 10.7.0.0 0.0.0.31* -access-class 5 in*
The network address 172.18.9.128 with netmask 255.255.255.128 is matched by which wildcard mask?
0.0.0.127*
A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25, 192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit entry?
0.0.1.255
The default administrative distance for a static route is -
1
Refer to the exhibit. A network administrator has just configured address translation and is verifying the configuration. What three things can the administrator verify? (Choose three.)
1. The name of the NAT pool is refCount.* 2. A standard access list numbered 1 was used as part of the configuration process.* 3. Address translation is working.*
What address will summarize the LANs attached to routers 2-A and 3-A and can be configured in a summary static route to advertise them to an upstream neighbor?
10.0.0.0/21*
. To enable RIP routing for a specific subnet, the configuration command network 192.168.5.64 was entered by the network administrator. What address, if any, appears in the running configuration file to identify this network?
192.168.5.0
Which subnet mask would be used as the classful mask for the IP address 128.107.52.27?
255.255.0.0*
Which subnet mask would be used as the classful mask for the IP address 192.135.250.27?
255.255.255.0*
What does the cost of an OSPF link indicate?
A lower cost indicates a better path to the destination than a higher cost does.
What is the purpose of setting the native VLAN separate from data VLANs?
A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs.
Match the router memory type that provides the primary storage for the router feature. (Not all options are used.)
A. flash B. NVRAM C. RAM D. ROM console access full operating system > flash limited operating system > ROM routing table > RAM startup configuration file > NVRAM
Match the order in which the link-state routing process occurs on a router. (Not all options are used.)
A. step 1 B. step 2 C. step 3 D. step 4 E. step 5 Each router is responsible for "saying hello" to its neighbors on directly connected networks. > step 2 Each router builds a Link-State Packet (LSP) containing the state of each directly connected link > step 3 Each router learns about its own directly connected networks. > step 1 Each router increments the hop count for the destination network. Each router floods the LSP to all neighbors, who then store all LSPs received in a database > step 4 Each router uses the database to construct a complete map of the topology and computes the best > step 5
The Branch Router has an OSPF neighbor relationship with the HQ router over the 198.51.0.4/30 network. The 198.51.0.8/30 network link should serve as a backup when the OSPF link goes down. The floating static route command ip route 0.0.0.0 0.0.0.0 S0/1/1 100 was issued on Branch and now traffic is using the backup link even when the OSPF link is up and functioning. Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?
Change the administrative distance to 120.*
What are two ways of turning off DTP on a trunk link between switches? (Choose two.)
Configure attached switch ports with the nonegotiate command option.* Place the two attached switch ports in access mode.*
Which two methods can be used to provide secure management access to a Cisco switch? (Choose two.)
Configure specific ports for management traffic on a specific VLAN.* Configure SSH for remote management.*
Which two statements are true about half-duplex and full-duplex communications? (Choose two.)
Full duplex offers 100 percent potential use of the bandwidth.* Full duplex allows both ends to transmit and receive simultaneously.*
Which two packet filters could a network administrator use on an IPv4 extended ACL? (Choose two.)
ICMP message type destination UDP port number
Which type of traffic would most likely have problems when passing through a NAT device?
IPsec
Which statement is correct about IPv6 routing?
IPv6 uses the link-local address of neighbors as the next-hop address for dynamic routes.
Fill in the blank.
In IPv6, all routes are level " 1 " ultimate routes.
Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)
In a switched network, they are mostly configured between switches at the core and distribution layers.* They are not associated with a particular VLAN.*
What benefit does NAT64 provide?
It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.
Which statement is true about the difference between OSPFv2 and OSPFv3?
OSPFv3 routers do not need to have matching subnets to form neighbor adjacencies.*
A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?
Only devices in VLAN 20 see the frame.
What caused the following error message to appear? 01:11:12: %PM-4-ERR_DISABLE: psecure-violation error detected on Fa0/8, putting Fa0/8 in err-disable state 01:11:12: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0011.a0d4.12a0 on port FastEthernet0/8. 01:11:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8, changed state to down 01:11:14: %LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to down
Port security was enabled on the switch port, and an unauthorized connection was made on switch port Fa0/8.
The buffers for packet processing and the running configuration file are temporarily stored in which type of router memory?
RAM*
Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?
Router R4 will become the DR and router R3 will become the BDR.*
A router needs to be configured to route within OSPF area 0. Which two commands are required to accomplish this? (Choose two.)
RouterA(config)# router ospf 1 RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0
Which two commands should be implemented to return a Cisco 3560 trunk port to its default configuration? (Choose two.)
S1(config-if)# no switchport trunk native vlan* S1(config-if)# no switchport trunk allowed vlan*
An attacker on PC X sends a frame with two 802.1Q tags on it, one for VLAN 40 and another for VLAN 12. What will happen to this frame?
SW-A will remove both tags and forward the rest of the frame across the trunk link, where SW-B will forward the frame to hosts on VLAN 40.*
A network administrator is using the router-on-a-stick method to configure inter-VLAN routing. Switch port Gi1/1 is used to connect to the router. Which command should be entered to prepare this port for the task?
Switch(config)# interface gigabitethernet 1/1 Switch(config-if)# switchport mode trunk
On a switch that is configured with multiple VLANs, which command will remove only VLAN 100 from the switch?
Switch(config)# no vlan 100
What is the purpose of an access list that is created as part of configuring IP address translation?
The access list defines the private IP addresses that are to be translated.*
While analyzing log files, a network administrator notices reoccurring native VLAN mismatches. What is the effect of these reoccurring errors?
The control and management traffic on the error-occurring trunk port is being misdirected or dropped.*
Which three requirements are necessary for two OSPFv2 routers to form an adjacency? (Choose three.)
The link interface subnet masks must match. The two routers must include the inter-router link network in an OSPFv2 network command. The OSPF hello or dead timers on each router must match.
Which two characteristics describe the native VLAN? (Choose two.)
The native VLAN provides a common identifier to both ends of a trunk.* The native VLAN traffic will be untagged across the trunk link.*
Which three advantages are provided by static routing? (Choose three.)
The path a static route uses to send data is known. Static routing does not advertise over the network, thus providing better security. Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.
What is a disadvantage of NAT?
There is no end-to-end addressing.
What happens immediately after two OSPF routers have exchanged hello packets and have formed a neighbor adjacency?
They exchange abbreviated lists of their LSDBs
What best describes the operation of distance vector routing protocols?
They send their routing tables to directly connected neighbors.
Fill in the blank. The acronym describes the type of traffic that has strict QoS requirements and utilizes a one-way overall delay less than 150 ms across the network.
VoIP
Which kind of message is sent by a DHCP client when its IP address lease has expired?
a DHCPREQUEST unicast message
Which three values or sets of values are included when creating an extended access control list entry? (Choose three.)
access list number between 100 and 199 source address and wildcard mask destination address and wildcard mask
A standard ACL has been configured on a router to allow only clients from the 10.11.110.0/24 network to telnet or to ssh to the VTY lines of the router. Which command will correctly apply this ACL?
access-group 11 in*
A router learns of multiple routes toward the same destination. Which value in a routing table represents the trustworthiness of learned routes and is used by the router to determine which route to install into the routing table for this specific situation?
administrative distance*
Which value represents the "trustworthiness" of a route and is used to determine which route to install into the routing table when there are multiple routes toward the same destination?
administrative distance*
When configuring a switch to use SSH for virtual terminal connections, what is the purpose of the crypto key generate rsa command?
create a public and private key pair
A new network policy requires an ACL to deny HTTP access from all guests to a web server at the main office. All guests use addressing from the IPv6 subnet 2001:DB8:19:C::/64. The web server is configured with the address 2001:DB8:19:A::105/64. Implementing the NoWeb ACL on the interface for the guest LAN requires which three commands? (Choose three.)
deny tcp any host 2001:DB8:19:A::105 eq 80* permit ipv6 any any*
A security specialist designs an ACL to deny access to a web server from all sales staff. The sales staff are assigned addressing from the IPv6 subnet 2001:db8:48:2c::/64. The web server is assigned the address 2001:db8:48:1c::50/64. Configuring the WebFilter ACL on the LAN interface for the sales staff will require which three commands? (Choose three.)
deny tcp host 2001:db8:48:1c::50 any eq 80* deny tcp any host 2001:db8:48:1c::50 eq 80* deny ipv6 any any*
A small-sized company has 20 workstations and 2 servers. The company has been assigned a group of IPv4 addresses 209.165.200.224/29 from its ISP. What technology should the company implement in order to allow the workstations to access the services over the Internet?
dynamic NAT
Which three pairs of trunking modes will establish a functional trunk link between two Cisco switches? (Choose three.)
dynamic desirable - dynamic auto* dynamic desirable - dynamic desirable* dynamic desirable - trunk*
A network administrator is explaining to a junior colleague the use of the lt and gt keywords when filtering packets using an extended ACL. Where would the lt or gt keywords be used?
in an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network device
What is a function of the distribution layer?
interconnection of large-scale networks in wiring closets
Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?
ip address dhcp
A college marketing department has a networked storage device that uses the IP address 10.18.7.5, TCP port 443 for encryption, and UDP port 4365 for video streaming. The college already uses PAT on the router that connects to the Internet. The router interface has the public IP address of 209.165.200.225/30. The IP NAT pool currently uses the IP addresses ranging from 209.165.200.228-236. Which configuration would the network administrator add to allow this device to be accessed by the marketing personnel from home?
ip nat inside source static tcp 10.18.7.5 443 209.165.200.225 443 ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365
Static routes are configured by the use of the global configuration command.
ip route
A router has used the OSPF protocol to learn a route to the 172.16.32.0/19 network. Which command will implement a backup floating static route to this network?
ip route 172.16.32.0 255.255.224.0 S0/0/0 200
Which summary IPv6 static route statement can be configured to summarize only the routes to networks 2001:db8:cafe::/58 through 2001:db8:cafe:c0::/58?
ipv6 route 2001:db8:cafe::/56 S0/0/0
Refer to the exhibit. Which type of route is 172.16.0.0/16?
level 1 parent route
a router learns of multiple toward the same destination. Which value in a routing table replesents the trustworthiness of learned routes and is used by the router to determine which route to install into the routing table for specific situation?
metric
A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is automatically added implicitly at the end of an ACL so that two adjacent routers can discover each other?
permit icmp any any nd-na
A network technician is configuring port security on switches. The interfaces on the switches are configured in such a way that when a violation occurs, packets with unknown source address are dropped and no notification is sent. Which violation mode is configured on the interfaces?
protect*
An OSPF router has three directly connected networks; 172.16.0.0/16, 172.16.1.0/16, and 172.16.2.0/16. Which OSPF network command would advertise only the 172.16.1.0 network to neighbors?
router(config-router)# network 172.16.1.0 0.0.255.255 area 0*
A network administrator is implementing a distance vector routing protocol between neighbors on the network. In the context of distance vector protocols, what is a neighbor?
routers that share a link and use the same routing protocol*
Which two commands can be used to verify the content and placement of access control lists? (Choose two.)
show access-lists show running-config
Which two factors are important when deciding which interior gateway routing protocol to use? (Choose two.)
speed of convergence scalability
Which information does a switch use to populate the MAC address table?
the source MAC address and the incoming port
Why would an administrator use a network security auditing tool to flood the switch MAC address table with fictitious MAC addresses?
to determine which ports are not correctly configured to prevent MAC address flooding*
What is the minimum configuration for a router interface that is participating in IPv6 routing?
to have only a link-local IPv6 address*
