What is a static packet-filtering firewall used for ？（）

A . It validates the fact that a packet is either a connection request or a data packet belonging to a connection B . It evaluates network packets for valid data at the application layer before allowing connections C . It analyzes network traffic at the network and transport protocol layers D . It keeps track of the actual communication process through the use of a state table

时间：2022-11-07 14:57:33 所属题库：CCNA(640-553)题库

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public class foo { public static void main （string[]args） try {return；} finally {system.out.printIn（“Finally”）；} } What is the result？（）

A . The program runs and prints nothing. B . The program runs and prints “Finally” C . The code compiles， but an exception is thrown at runtime. D . The code will not compile because the catch block is missing.

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public class Yippee2 { static public void main（String [] yahoo） { for（int x= 1； xSystem.out.print（yahoo[x] + “ “）； } } } and the command line invocation： java Yippee2 a b c What is the result？（）

A . a b B . b c C . a b c D . Compilation fails. E . An exception is thrown at runtime.

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What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5？（）

A . It creates a global address pool for all outside NAT transactions. B . It establishes a dynamic address pool for an inside static address. C . It creates dynamic source translations for all inside local PAT transactions. D . It creates a one-to-one mapping between an inside local address and an inside global address. E . It maps one inside source address to a range of outside global addresses.

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public class TestOne { public static void main （String[] args） throws Exception { Thread.sleep（3000）； System.out.println（”sleep”）； } } What is the result？（）

A . Compilation fails. B . An exception is thrown at runtime. C . The code executes normally and prints “sleep”. D . The code executes normally， but nothing is printed.

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public class foo { public static void main （stringargs） try {return；} finally {system.out.printIn（“Finally”）；} } What is the result？（）

A . The program runs and prints nothing. B . The program runs and prints “Finally” C . The code compiles， but an exception is thrown at runtime. D . The code will not compile because the catch block is missing.

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public class Test { private static float[] f = new float[2]； public static void main（String args[]） { System.out.println（“f[0] = “ + f[0]）； } } What is the result？（）

A . f[0] = 0 B . f[0] = 0.0 C . Compilation fails. D . An exception is thrown at runtime.

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Public class test （ Public static void main （String args[]）（ System.out.printIn （6 ^ 3）；）） What is the output？（）

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Public class test （ Public static void main （String args）（ System.out.printIn （6^3）；）） What is the output？（）

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Static VLANs are being used on the Company network. What is true about static VLANs？（）

A . Devices use DHCP to request their VLAN. B . Attached devices are unaware of any VLANs. C . Devices are assigned to VLANs based on their MAC addresses. D . Devices are in the same VLAN regardless of which port they attach to.

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public class Test { public static void main（String[] args） { String str = NULL； System.out.println（str）； } } What is the result？（）

A . NULL B . Compilation fails. C . The code runs with no output. D . An exception is thrown at runtime.

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1. public class X { 2. public static void main （String[]args） { 3. int [] a = new int [1] 4. modify（a）； 5. System.out.printIn（a[0]）； 6. } 7. 8. public static void modify （int[] a） { 9. a[0] ++； 10. } 11. } What is the result？（）

A . The program runs and prints “0” B . The program runs and prints “1” C . The program runs but aborts with an exception. D . An error “possible undefined variable” at line 4 causes compilation to fail. E . An error “possible undefined variable” at line 9 causes compilation to fail.

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public class Delta { static boolean foo（char c） { System.out.print（c）； return true； } public static void main（ String[] argv ） { int i =0； for （ foo（‘A’）； foo（‘B’）&&（i<2）； foo（‘C’））{ i++ ； foo（‘D’）； } } } What is the result？（）

A . ABDCBDCB B . ABCDABCD C . Compilation fails. D . An exception is thrown at runtime.

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1. public class A { 2. void A（） { 3. System.out.println（“Class A”）； 4. } 5. public static void main（String[] args） { 6. new A（）； 7. } 8. } What is the result？（）

A . Class A B . Compilation fails. C . An exception is thrown at line 2. D . An exception is thrown at line 6. E . The code executes with no output.

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public class Test { private static int[] x； public static void main（String[] args） { System.out.println（x[0]）； } } What is the result？（）

A . 0 B . null C . Compilation fails. D . A NullPointerException is thrown at runtime. E . An ArrayIndexOutOfBoundsException is thrown at runtime.

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public class foo { public static void main （Stringargs） { String s； system.out.printIn （“s=” + s）； } } What is the result？（）

A . The code compiles and “s=” is printed. B . The code compiles and “s=null” is printed. C . The code does not compile because string s is not initialized. D . The code does not compile because string s cannot be referenced. E . The code compiles， but a NullPointerException is thrown when toString is called.

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public class TestString 1 { public static void main（String[] args） { String str = “420”； str += 42； System.out.print（str）； } } What is the output？（）

A . 42 B . 420 C . 462 D . 42042 E . Compilation fails. F . An exception is thrown at runtime.

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public static void search（List list） { list.clear（）； list.add（”b”）； list.add（”a”）； list.add（”c”）； System.out.println（Collections.binarySearch（list， “a”））； } What is the result of calling search with a valid List implementation？（）

A . 0 B . 1 C . a D . b E . c F . The result is undefined.

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（）is not a static load.

A . Actual weight of the ship's structure，outfitting，equipment and machinery B . Ballast load（weight） C . Cargo load D . Slamming and sloshing load

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What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5（）。

A . It creates a global address pool for all outside NAT transactions B . It establishes a dynamic address pool for an inside static address C . It creates dynamic source translations for all inside local PAT transactions D . It creates a one-to-one mapping between an inside local address and an inside global address E . It maps one inside source address to a range of outside global addresse

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class A { public byte getNumber（） { return 1； } } class B extends A { public short getNumber（） { return 2； } public static void main（String args[]） { B b = new B（）； System.out.println（b.getNumber（））； } } What is the result？（）

A . 1 B . 2 C . An exception is thrown at runtime. D . Compilation fails because of an error in line 8. E . Compilation fails because of an error in line 14.

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public class Foo { public static void main（String[] args） { try { return； } finally { System.out.println（ “Finally” ）； } } } What is the result？（）

A . Finally B . Compilation fails. C . The code runs with no output. D . An exception is thrown at runtime.

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public class X { public static void main （Stringargs） { string s = new string （“Hello”）； modify（s）； System.out.printIn（s）； } public static void modify （String s） { s += “world!”； } } What is the result？（）

A . The program runs and prints “Hello” B . An error causes compilation to fail. C . The program runs and prints “Hello world!” D . The program runs but aborts with an exception.

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S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology shown in the exhibit. Originally, static routes were configured between these routers to successfully route traffic between the attached networks. What will need to be done in order to use RIPv2 in place of the static routes？（）

<img src='https://img2.soutiyun.com/shangxueba/ask/64407001-64410000/64409000/17b75ef15006e963a847746eb8ec9a38.png' /> A.Configure the no ip subnet-zero command on R1, R2, and R3. B.Dynamic routing protocols such as RIPv2 cannot be used across Frame Relay networks. C.Configure the S0/0 interface on R1 as two subinterfaces and configure point-to-point links to R2 and R3. D.Change the 172.16.2.0/25 and 172.16.2.128/25 subnetworks so that at least two bits are borrowed from the last octet. E.Change the network address configuration to eliminate the discontiguous 172.16.2.0/25 and 172.16.2.128/25 subnetwork.

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Given: public class Test { public static void main （）; } } What is the result？

A．An exception is thrown． B．The code will not compile C．The program prints “null” D．The program prints “blue” E．The program prints “green”

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What is a static packet-filtering firewall used for ？（）

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