You add the following commands into a routed topology: router eigrp 1 variance 3 traffic-share min
across-interfaces. Users now complain about voice quality in your VoIP system. What should be
done?

You are the network administrator of a medium-sized company, and users are complaining that
they cannot send emails to some organizations. During your troubleshooting, you notice that your
DNS MX record is blacklisted by several public blacklist filters. After clearing these listings for your
IP address, and assuming that your email server has the right virus protection in place, what are
two possible solutions to prevent this from happening in the future? (Choose two.)

A router that acts as an Internet border gateway has multiple upstream connections that are used
in a load-sharing setup. The NOC has identified a DDoS attack from a specific source entering its
network via interface GigabitEthernet0/1.
The NOC wants to block this suspicious traffic on the border router in a scalable way and without
major changes to the different interface configurations.
Which configuration would block the DDoS attack from the known source (194.90.1.5)?

Refer to exhibits 1 and 2. A company uses a Metro Ethernet (Gigabit Ethernet) dedicated circuit to
communicate between users (subnet B) and servers (subnet A) as shown in Exhibit 1. Both
routers use OSPF to advertise the subnets. During a weekly management meeting, they realize
that the WAN link is oversize. They have been using only 2 Mb/s in the worst-case scenario. So
they propose a new, cheaper WAN connection using a 2-Mb/s Frame-Relay point-to-point link to
interconnect both sites (Exhibit 2). The Frame Relay service provider informs them that multicast
traffic is not allowed to run over the service provider network. Which one of these options is best to
enable the company to establish the OSPF neighbor adjacency?

Refer to the exhibit. Users from the Engineering VLAN complain that every time Business VLAN
users have a network connectivity issue, the Engineering VLAN users usually have problems
experiencing slow response or network connectivity problems. After troubleshooting, an
unauthorized switch 2 was found. This unauthorized switch has been a regular problem, assuming
the root bridge function under the spanning-tree domain and causing the Engineering VLAN to be
unstable. Which three of these actions could be suggested to fix the problem?

You are deploying two core switches, one in each building, 50 km away from each other. The
cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk.
You configured it correctly but the link does not come up. The port is in the “admin up” state, and
the line protocol is in the “down” state. The fiber link is OK. What would be the most likely reason
for the link not to come up?

Your company is researching a new application that runs over IPv6, but part of it must still have
IPv4 support. Your company uses a traditional IPv4 network. Your plan is not to run IPv6 over the
whole network, but to segment parts of the network or even to operate simultaneously with IPv6
and IPv4. You must make a brief presentation about IPv6 technology to the board of technical
directors. Which three of these items could be part of your presentation? (Choose three.)

Refer to the exhibit.

The Layer 2 network uses VTP to manage its VLAN database. A network designer created all
VLANs on the VTP server (switch 1) and it has been advertised through VTP to all other VTP
clients (switches 2 through 4). Due to network growth, a network operator decided to add a new
switch between switch 1 and switch 3. The network operator has been instructed to use a
refurbished switch and use a VTP client. Which three of these has been instructed to use a
refurbished switch and use a VTP client. Which three of these factors should the network operator
consider to minimize the impact of adding a new switch? (Choose three.)

Refer to the exhibit.

R1 has two eBGP sessions to ISP1 and ISP2 (one to each ISP router), and R1 receives the same
prefixes through both links.
Which configuration should be applied for the link between R1 and ISP2 to be preferred for
incoming traffic (ISP2 to R1)?

Refer to the exhibit.

AS65000 has core network P1 – P6. The eBGP peers to another AS are through ASBR1-2 and
ASBR3-4. All business and residential customer POPs are connected to the P1 – P2 core.

AS65000 has decided to enable MPLS LDP on all BGP routers, and disable BGP on the core
network (P1 – P6). What is the drawback of this BGP core-free network?