Routing Protocols
Subnetting
ACL
WAN / Ethernet Tech
Switch Protocols
100
You are designing an internetwork. You need to select routing protocols that support classless routing. Which routing protocols can be used in your design? Select the three best answers. A. RIP v.1 B. RIP v.2 C. IGRP D. OSPF E. EIGRP
What is Answers: B, D, E Explanation B: One of the major differences between RIP v.1 and RIP v.2 is that RIP v.2 is classless. RIP v.2 carries a subnet mask field in packets it sends, and it is no more limited to standard classes, or directly connected networks. Explanation D: The OSPF protocol is a classless routing protocol. LSA packets that the OPSF process uses carry information about network address, subnet mask, and interface status. Explanation E: EIGRP is a successor to IGRP, and as such, uses classless routing. IGRP and EIGRP can easily be integrated to work together (by means of redistribution).
100
You are designing a network for an organization that needs 205 IP addresses for their segment that is connected to the Internet. Assuming that the company will use a single IP network address space, which IP address class would you choose for this organization’s network? Select the best answer. A. Class A B. Class B C. Class C D. Class D E. Class E
What is Answer: C Explanation: Class C allows for only 254 addresses per subnet, which is enough according to this question’s requirements.
100
You are designing an access list to block IP traffic from host with IP address 10.1.1.10 to any other host. Which command(s) would you use? Select the best answer. A. access-list 1 deny 10.1.1.10 255.255.255.255 B. access-list 2 deny 10.1.1.10 0.0.0.0 C. access-list 3 permit any access-list 3 deny 10.1.1.10 D. access-list 4 deny any access-list 4 permit 10.1.1.10
What is Answer: B Explanation: This is the correct syntax. The wildcard bits (reverse address mask) containing four zeroes specify that only the particular address will be denied access. The wildcard bits can be skipped in this example, because the single host wildcard bits are implicit.
100
When designing your LAN, you need to select a device that would allow you to perform microsegementation. Which device would you use? Select the best answer. A. Hub B. Repeater C. Bridge D. Switch E. Router
What is Answer: D Explanation: Switches are devices that are used to perform microsegmentation due to the fact that they can have considerably higher port density than other network devices, and that they are able to create separate collision domains (segments). With microsegmentation it is possible that a single device is connected in each collision domain.
100
You are designing a switched LAN. How will an Ethernet switch improve network performance? Select the two best answers. A. Switches create separate broadcast domains within your internetwork. B. Switches separate collision domains. C. Switches forward traffic selectively. D. Switches propagate electric signals faster than any other network device. E. Switches are able to amplify electric signals, while other devices cannot.
What is Answers: B, C Explanation B: This is one of the most important functions a switch performs. By separating collision domains, switches maximize media utilization as network devices can transmit frames with less (or no) possibility of a collisiontaking place within their own collision domain. Explanation C: This is another important reason why switches provide for better performance. By selectively forwarding traffic, switches guarantee that no unnecessary traffic is propagated out from ports to devices that are not intended recipients.
200
You are designing an IP internetwork. You heard about a routing protocol that utilizes an efficient fast convergence algorithm, called DUAL, and you decide to use this protocol. Which protocol will you select? Select the best answer. A. RIP v.1 B. RIV v.2 C. IGRP D. EIGRP E. OSPF
What is Answer: D Explanation: EIGRP utilizes the DUAL algorithm, which uses two techniques that allow Enhanced IGRP to converge very quickly.
200
You are designing a network that needs to support 55 users. You don’t plan to extend the segment beyond the current number of users. Which subnet mask would best meet your needs? Select the best answer. A. 255.0.0.0 B. 255.224.0.0 C. 255.255.255.128 D. 255.255.255.192 E. 255.255.255.120
What is Answer: D Explanation: This subnet mask supports 62 users per segment, which meets your needs.
200
You are designing an access list that will block TCP traffic to a specific application using port 25. Which number will you use for this access list? Select the best answer. A. 25 B. 31 C. 101 D. 201 E. 876
What is Answers: C Explanation: Access lists with numbers 100-199 are used for extended IP access lists. Extended IP access lists allow the use of complex criteria for filtering traffic. This might include source and destination TCP or UDP ports, precedence, TCP session state, and many more.
200
You are designing an internetwork. For dial-up links, you want to use a protocol that provides for authentication, compression, and multilink capabilities. Which protocol would you use? Select the best answer. A. HDLC B. SDLC C. Frame Relay D. PPP E. SLIP
What is Answer: D Explanation: The PPP protocol is a widely used WAN protocol that provides for modular configuration by means of the so-called Link Control Protocol, and Network Control Protocol. These protocols allow for “add-ons” to the PPP protocol, one of which is authentication. Compression and multilink are other extensions of the PPP protocol.
200
You are monitoring the STP operation of your switch. Which of the following port states would allow traffic to be examined and addresses to be learned? Select the best answers. A. Listening B. Learning C. Blocking D. Forwarding E. Disabled
What is Answers: B, D Explanation B: An interface in Learning state prepares to participate in frame forwarding. This interface won’t forward frames, however, it will be learning addresses from received frames. BPDUs will be examined. Explanation D: An interface in forwarding state will forward frames. In addition, this interface will learn addresses from frames it receives. BPDUs will be examined.
300
You are designing a large IP internetwork. You need to select a routing protocol. To conserve network bandwidth, you need a protocol that will be able to periodically transmit only changes in its routing table. The protocol should provide for unequal path cost load balancing. Which protocol would you select? Select the best answer. A. RIP B. OSPF C. IGRP D. EIGRP E. IS-IS
What is Answer: D Explanation: EIGRP transmits its full routing table only once, and it then periodically transmits changes only. In addition, EIGRP is able to provide unequal cost path load balancing.
300
You are designing an internetwork for an organization that needs 50,000 IP addresses. Assuming that the company will use a single IP network address space, which IP address class would you choose for this organization’s network? Select one answer. A. Class A B. Class B C. Class C D. Class D E. Class E
What is Answer: B Explanation: Class B allows for 65,534 addresses within the internal network, so this address class would be sufficient for this company’s network. A single class C would not suffice.
300
You are designing an access list to filter TCP traffic from a host with an IP address of 192.168.1.1 to any other host in the range of destination ports 200-400. Which commands will you use? Select the best answer. A. access-list 101 deny ip host 192.168.1.1any eq 200 access-list 101 deny ip host 192.168.1.1 any eq 400 B. access-list 102 deny tcp host 192.168.1.1 any eq 200 access-list 102 deny tcp host 192.168.1.1 any eq 400 C. access-list 103 deny tcp host 192.168.1.1 any gt 200 access-list 103 deny tcp host 192.168.1.1 any lt 400 D. access-list 104 deny tcp host 192.168.1.1 lt 400 access-list 104 deny tcp host 192.168.1.1 gt 200 E. access-list 105 deny tcp host 192.168.1.1 any range 200 400
What is Answer: E Explanation: This is the correct command -any traffic from host 192.168.1.1 to any server on ports 200-400 will be denied.
300
You are configuring one of the FastEthernet interfaces of a Cisco Catalyst 2950 switch. Which of the following values can be used as parameters of the speed command? Select the three best answers. A. auto B. 10 C. 100 D. 1000 E. full
What is Answers: A, B, C Explanation A: This is a valid value for the speed command. Speed auto configures the switch port for automatic detection of connection speed. Explanation B: This is a valid value for the speed command. Speed 10 configures the switch port for a fixed connection speed -10 Mbps. Explanation C: This is a valid value for the speed command. Speed 100 configures the switch port for a fixed connection speed -100 Mbps
300
Which of the following commands is used in interface configuration mode of a Cisco Catalyst 2950 to specify that a port is connected to an end device? Select the best answer. A. switchport access host B. switchport access end-node C. switchport mode access D. switchport mode end-node E. siwtchport nonegotiate
What is Answer: C Explanation: This is the correct command. The switchport mode access command configures a switch port for a host, which will be accessing network resources. The switchport mode command has an option trunk, which is used to specify that the port is connected to another switch, and should be used as a trunk.
400
You are configuring your router. You have altered the configuration and saved it to NVRAM; however, you decide to make a backup copy of the configuration used to start the router. You want to do this so that you can revert to it. Which command can you use? Select the best answer. A. copy tftp running-config B. copy tftp startup-config C. copy running-config tftp D. copy startup-config tftp E. copy flash tftp
What is Answer: D Explanation: This is the correct command. This command will copy the configuration file used to start the router to a TFTP network location.
400
Your company uses the 172.16.0.0/16 address space. You need to plan the address space for equal-sized subnets with no more than 1022 users in each subnet. How many subnets can you have in your company’s network? Select the best answer. A. 64 B. 128 C. 1024 D. 2048
What is Answer: A Explanation: 64 subnets require 6 bits, as 10 bits are used in the third and fourth octet for host addresses, and they allow for 1022 host addresses (1024 addresses in total).
400
You are designing an access list that needs to block any IP traffic to a specific host with the IP address 172.16.1.1. Which command would you use? Select the best answer. A. access-list deny any 172.16.1.1 B. access-list deny 172.16.1.1 any C. Access-list 103 deny ip any 172.16.1.1 255.255.255.255 D. access-list 104 deny ip any host 172.16.1.1 E. access-list 105 permit ip any any access-lsit 105 deny ip any host 172.16.1.1
What is D. access-list 104 deny ip any host 172.16.1.1 Explanation: This is the correct command. It would deny any IP traffic from any host to the host with IP address 172.16.1.1.
400
Which of the following is true about Ethernet Full Duplex operation? Select the three best answers. A. It requires point-to-point links. B. It is not standard. C. Full-duplex provides for collision-free operation. D. There is no need to schedule retransmissions.
What is Answers: A, C, D Explanation A: Full-duplex transmission requires point-to-point links. A point-to-point link guarantees that there is no media contention, so that media can always be used by the device to transfer data without causing collisions. Explanation C: Full-duplex transmission requires point-to-point links. A point-to-point link guarantees that there is no media contention, so that media can always be used by the device to transfer data without causing collisions. Explanation D: As there are no collisions, frame retransmission is not necessary. This simple fact contributes to fullduplex operation as a high-performance, high-reliability technology.
400
Which trunking protocols can you use on a trunk link between two Cisco switches? Select the best two answers. A. PPP B. ISL C. 802.1x D. 802.11 E. 802.1Q
What is Answers: B, E Explanation B: ISL is a Cisco proprietary protocol used for trunking between switches. This protocol should only be used when trunking between Cisco devices. Explanation E: The 802.1Q protocol is an IEEE standard for trunking between switches. This protocol is supported by most of the switch vendors, including Cisco. It can be used in heterogeneous environments
500
Which command is used to configure a subnet mask on a router interface? Select the best answer. A. subnet-mask B. ip mask-reply C. ip subnet-mask D. ip address
What is Answer: D Explanation: This single command allows you to configure both an IP address and a subnet mask on a particular router interface. You need to issue the same command and reassign the IP address if you only need to modify the subnet mask
500
Which of the following sunet addresses do not share the same subnet ID? A. 151.100.225.1 255.255.192.0 B. 151.100.193.45 255.255.192.0 C. 151.100.156.10 255.255.192.0 D. 151.100.255.254 255.255.192.0 C. 151.100.199.255 255.255.192.0
What is C. 151.100.156.10 Explination: The valid host range for the majority of the addresses above is 151.100.193.0-151.100.255.254. With a magic number of 64 the increment takes (C.) out of the majority subnet IDs.
500
You are designing an access list that will block all user IP traffic from a client subnet. Which number will you use for this access list? Select the best answer. A. 9 B. 355 C. 624 D. 833 E. 1003
What is Answer: A Explanation: Access lists with numbers 1-99 and 1300-1999 are standard IP access lists. When IP traffic sourced from a specific host, or group of hosts, needs to be permitted or denied, a standard IP access list is the best solution.
500
You don’t want your router to disconnect your telnet session if it has been idle for some time. Which command can you use to configure this behavior? Select the best answer. A. exec-timeout B. idle-timeout C. diconnnect-time D. dispatch-timeout E. logout-warning
What is Answer: A Explanation: This command is used to specify the idle time after which telnet connections (and some other connections, such as console) will be disconnected. It takes two parameters -minutes and seconds before the session is disconnected. If both parameters are set to 0, the session is never disconnected. The no exec-timeout command has the same effect.
500
You want to be able to remotely connect to a switch and manage it. Which set of commands can you use on the switch to manually assign it an IP address? Select the best answer. A. management-ip 192.168.2.1 B. interface vlan 20 ip address 192.168.2.1 255.255.255.0 C. ip management-addess 192.168.2.1 D. ip access-list E. You can’t assign a management IP address manually.
What is Answer: B Explanation: This is the correct set of commands. VLANs are represented as layer 3 interfaces in the Cisco Catalyst IOS, and you assign VLANs IP addresses as you would any other layer 3 interface.
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