Final Exam

You are configuring a wireless LAN (WLAN) with three wireless access points having overlapping coverage areas. The wireless access points are using the 2.4 GHz frequency band, and are located in the United States. What three non-overlapping channels in the 2.4 GHz band should you select?

A. 1 B. 6 C. 11

What is the bandwidth of a T1 digital circuit?

A. 1.544 Mbps

Given the following network address translation (NAT) topology, identify the IP address that is the outside global IP address. (NOTE: To avoid using an organization's actual IP addresses in this question, all IP addresses are technically private IP addresses. However, assume that the 172.16.1.0/24 network and the 10.1.2.3 IP address are publicly routable.)

A. 10.1.2.3

A router's IP routing table has the following entries: Network Next Hop 10.0.0.0/8 10.2.2.2 10.1.0.0/16 192.168.1.2 10.1.1.0/24 172.16.1.2 0.0.0.0/0 10.3.3.2 To which next hop IP address will the router forward a packet destined for 10.1.2.1?

A. 192.168.1.2

What is the size of an MPLS header?

A. 32 bits

How big is the payload of an ATM cell?

A. 48 Bytes

What DSL variant has a distance limitation of 18,000 ft. between a DSL modem and its DSLAM?

A. ADSL

ISDN is considered to be what type of WAN connection?

A. Circuit-switched connection

What variation of network address translation (NAT) automatically assigns an inside global address from a pool of available addresses?

A. DNAT

In cable modem technologies, the frequencies dedicated to data transmission are specified by what?

A. DOCSIS

If a PC on an Ethernet network attempts to communicate with a host on a different subnet, what destination IP address and destination MAC address will be placed in the packet/frame header sent by the PC?

A. Dest. IP: IP address of remote host. Dest. MAC: MAC address of default gateway.

What technology is similar to WiMAX and offers wireless broadband service? The maximum data rate is 84 Mbps.

A. HSPA+

Which two of the following are wireless broadband technologies?

A. HSPA+ C. WiMAX

Which of the following routing protocols are interior gateway protocols?

A. IS-IS C. EIGRP D. OSPF

Which of the following WAN technologies commonly use unshielded twisted pair (UTP)?

A. ISDN B. POTS dial-up modem C. DSL modem

WEP's RC4 approach to encryption uses a 24-bit string of characters added to transmitted data, such that the same plain-text data frame will never appear as the same WEP-encrypted data frame. What is this string of characters called?

A. Initialization vector

Which of the following is used by IEEE 802.11n to achieve high throughput through the use of multiple antennas for transmission and reception?

A. MIMO

A box containing a demarc is called a ______________.

A. NID

Which two routing protocols use bandwidth in their calculation of metric by default?

A. OSPF D. EIGRP

Which two of the following are types of Integrated Services Digital Network (ISDN) circuits?

A. PRI B. BRI

ATM can be considered in which of the following WAN categories?

A. Packet switched D. Cell switched

Which of the following are examples of interior gateway protocols?

A. RIP B. BGP D. OSPF

What variation of network address translation (NAT) allows you to statically configure the inside global address assigned to a specific device inside your network?

A. SNAT

What does the term asymmetric mean in DSL?

A. The upload speed and the download speed differ.

Which two of the following are common wireless security standards?

A. WEP D. WPA

Which of the following is the point in a telephone network where the maintenance responsibility passes from a telephony company to a subscriber (unless the subscriber has purchased inside wiring maintenance)?

A. demarc

Which of the following wireless LAN (WLAN) security threats involves a user writing a symbol in a public place, letting other users know about the existence of a WLAN, and possibly information about how to access that WLAN?

A. warchalking

When using the 2.4-GHz band for multiple access points in a WLAN located in the United States, which non-overlapping channels should you select?

B. 1 D. 6 F. 11

When extended the range for a 2.4-GHz WLAN, you can use nonoverlapping channels for adjacent coverage cells. However, there should be some overlap in coverage between those cells (using nonoverlapping channels) to prevent a connection from dropping as a user roams from one coverage cell to another. What percentage of coverage overlap is recommended for these adjacent cells?

B. 10 percent to 15 percent

If multiple wireless access points exist in a wireless LAN (WLAN), what percentage of coverage overlap should the access points have?

B. 10 to 15 percent

What is the administrative distance of RIP in a Cisco network?

B. 120

What is the bandwidth of an OC-3?

B. 155.52 Mbps

What is the data rate of an OC-3 connection?

B. 155.52 Mbps

What is the maximum range of the IEEE 802.11b wireless standard?

B. 32 m indoors / 140 m outdoors

You are configuring a wireless access point (AP). You specify a wireless standard of 802.11n operating in the 2.4 GHz band. You also select an option to make it operate in a "backwards compatible" mode. Therefore, what additional 802.11 standards are supported?

B. 802.11b C. 802.11g

Which of the following are ways routes can be injected into a router's IP routing table?

B. A route is statically configured. C. A route is dynamically learned. D. A route is redistributed from one routing source into a dynamic routing protocol. E. A route is directly connected.

What protocol is used to request a MAC address that corresponds to a known IPv4 address on the local network?

B. ARP

What routing protocol characteristic indicates the believability of the routing protocol (as opposed to other routing protocols)?

B. Administrative distance

What is a routing protocol that is used for moving prefixes back and forth between different autonomous systems?

B. BGP

Which of the following routing protocols is an EGP?

B. BGP

A wireless LAN (WLAN) containing only one access point (AP) is known as what type of WLAN?

B. BSS

Where is PPPoE typically used in a DSL environment?

B. Between the home and a service provider

What technology do WLANs use to determine when they gain access to the wireless media?

B. CSMA/CA

What is the name of the device that terminates a dedicated leased line circuit?

B. CSU/DSU

What device terminates the DSL signal coming from a customer?

B. DSLAM

A WLAN formed directly between wireless clients (without the use of a wireless AP) is referred to as what type of WLAN?

B. IBSS

A T3 connection is an example of which WAN type?

B. Leased line

Which of the following is a type of network, commonly used by service providers, that makes forwarding decisions based on a label contained in a 32-bit header?

B. MPLS

Which PPP authentication method provides one-way authentication and sends credentials in clear text?

B. PAP

Which of the following are distance-vector routing protocol features that can prevent routing loops?

B. Poison reverse D. Split horizon

What option is perfect for remote locations that do not have many WAN connectivity possibilities?

B. Satellite

Which of the following approaches to wireless LAN (WLAN) security uses RC4 as its encryption algorithm?

B. WEP

Routing protocols differ in the amount of time they require to fail over from a previously active route to a backup route. What is the name for this routing protocol property?

B. convergence

What type of antenna radiates power at relatively equal power levels in all directions?

B. omnidirectional

Which of the following is a type of network interface device (NID) that includes circuitry to perform such functions as converting between framing formats on a digital circuit?

B. smart jack

Which of the following is an example of an EGP?

BGP

What is the administrative distance of internal BGP in a Cisco network?

C. 200

How big is the payload portion of an ATM cell?

C. 48 bytes

In a wireless LAN (WLAN) operating in the 2.4 GHz band, access points (APs) with adjacent coverage areas should have how many channels of separation to avoid interfering with one another?

C. 5

What IEEE 802.11 variant supports a maximum speed of 54 Mbps and uses the 2.4-GHz band?

C. 802.11g

What NAT variation automatically assigns an inside global address from a pool of available addresses?

C. DNAT

A Cisco router has learned a network via three different routing protocols: OSPF, EIGRP, and RIP. Which route will the router believe (that is, inject into the router's IP routing table)?

C. EIGRP

What multicast protocol is used between clients and routers to let routers know which of their interfaces are connected to a multicast receiver?

C. IGMP

What NAT IP address is a public IP address that maps to an inside device?

C. Inside global

If a WLAN does not require a user to provide any credentials to associate with a wireless AP and access the WLAN, what type of authentication is said to be in use?

C. Open

What is a very common protocol found on dedicated leased lines?

C. PPP

What technology is typically used in conjunction with DSL?

C. PPPoE

What loop-prevention mechanism is an override of another loop-prevention mechanism?

C. Poison reverse

What technology operates in the 3 kHz through 300 GHz range?

C. Radio

Frame Relay is an example of what WAN connection type?

C. packet switched

Which of the following wireless LAN (WLAN) security threats is also known as an "evil twin?"

C. rogue access point

What is the best possible value for administrative distance?

D. 0

What is the IP address used in a default static route?

D. 0.0.0.0

What is the subnet mask address used in a default static route?

D. 0.0.0.0

What is the network address and subnet mask of a default route?

D. 0.0.0.0/0

What is the administrative distance of OSPF in a Cisco network?

D. 110

identify the IP address that is the inside global IP address. (NOTE: To avoid using an organization's actual IP addresses in this question, all IP addresses are technically private IP addresses. However, assume that the 172.16.1.0/24 network and the 10.1.2.3 IP address are publicly routable.)

D. 172.16.1.2

Refer to the exhibit. Given the network address translation (NAT) topology, identify the IP address that is the inside local IP address. (NOTE: To avoid using an organization's actual IP addresses in this question, all IP addresses are technically private IP addresses. However, assume that the 172.16.1.0/24 network and the 10.1.2.3 IP address are publicly routable.)

D. 192.168.1.2

The IEEE 802.11n wireless standard has which of the following frequency band / maximum bandwidth parameters?

D. 2.4 GHz or 5 GHz / > 300 Mbps

How many channels on an E1 circuit are available for voice, video, or data?

D. 30

Which of the following approaches to wireless LAN (WLAN) security involves the use of an authentication server?

D. 802.1X

Which routing protocol uses a complex set of metrics called path vectors?

D. BGP

OSPF uses cost as a metric value. What is this cost value based on?

D. Bandwidth

Identify one of the following that acts as a digital modem (that is, a device that connects to a digital circuit and can distinguish between various DS0s on that digital circuit).

D. CSU/DSU

ISDN is an example of which of these WAN types?

D. Circuit switched

What locally significant identifier is used by a Frame Relay network to reference a virtual circuit?

D. DLCI

What specification identifies the cable television frequencies dedicated to data transmission?

D. DOCSIS

What kind of network is used by many cable companies to service their cable modems and contains both fiber-optic and coaxial cabling?

D. HFC

What does RIP use for a metric?

D. Hop Count

What type of antenna, commonly used in wireless APs and wireless routers in SOHO locations, radiates relatively equal power in all directions?

D. Omnidirectional

What variation of network address translation (NAT) allows multiple inside local addresses to share a single inside global address?

D. PAT

Which of the following is a distance-vector routing protocol with a maximum usable hop count of 15?

D. RIP

What loop-prevention mechanism will prevent a route from being advertised out an interface from which it was learned?

D. Split horizon

What is the leased line technology that has a bandwidth capacity of 44.7 Mbps?

D. T3

Which type of DSL usually offers the highest bandwidth?

D. VDSL

Which of the following approaches to wireless LAN (WLAN) security requires users to authenticate against an authentication server's database, rather than a client being configured with a PSK?

D. WPA Enterprise

What standard developed by the Wi-Fi Alliance implements the requirements of IEEE 802.11i?

D. WPA2

What metric is used by the OSPF routing protocol?

D. cost

What type of route is manually configured in a router's routing table and tells a router where to send traffic destined for a network not in the router's routing table?

D. default static route